| Article Index |
|---|
| Tổng hợp bài tập và bài giải C/C++ (P2) |
| 2 |
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1:SẮP XẾP MẢNG
#include<alloc.h>
#include<stdio.h>
#include<conio.h>
//=======================================
void taolap(int *A,int n)
{
int i;
printf("\n Tao lap day so:\n");
for(i=0;i<n;i++)
{
printf("\n A[%d]=",i);
scanf("%d",&A[i]);
}
}
void dayso(int *A,int n)
{
int i;
for(i=0;i<n;i++)
printf("%5d",A[i]);
}
void select(int *A,int n)
{
int i,j,temp;
for(i=0;i<n-1;i++)
{
for(j=i+1;j<n;j++)
{
if(A[i]>A[j])
{
temp=A[i];
A[i]=A[j];
A[j]=temp;
}
}
}
printf("\n Ket qua thu duoc la:");
dayso(A,n);
}
void luachon()
{
clrscr();
int *A,n;
printf("\n \t SAP XEP KIEU LUA CHON\n");
printf("\n Nhap so phan tu n=");
scanf("%d",&n);
A=(int*)malloc(n*sizeof(int));
taolap(A,n);
select(A,n);
free(A);
getch();
}
//=======================================
void in2(int *A,int n)
{
int i;
for(i=0;i<n;i++)
printf("%5d",A[i]);
}
void tructiep()
{
clrscr();
int *A,i,j,n,temp;
printf("\n SAP XEP KIEU TRUC TIEP\n");
printf("\n\t SAP XEP KIEU TRUC TIEP\n");
printf("\n Nhap so phan tu n=");
scanf("%d",&n);
A=(int*)malloc(n*sizeof(int));
printf("\n Tao lap day so:\n");
for(i=0;i<n;i++)
{
printf("\n A[%d]=",i);
scanf("%d",&A[i]);
}
for(i=1;i<n;i++)
{
temp=A[i];
for(j=i-1;j>=0&&temp<A[j];j--)
A[j+1]=A[j];
A[j+1]=temp;
printf("\n\nKet qua lan thu %d:",i);
in2(A,i+1);
}
free(A);
getch();
}
//=======================================
void tlap(int *A,int n)
{
int i;
printf("\n");
printf("\n Tao lap day so:\n");
for(i=0;i<n;i++)
{
printf("\n A[%d]=",i);
scanf("%d",&A[i]);
}
}
void in1(int *A,int n)
{
int i;
for(i=0;i<n;i++)
printf("%5d",A[i]);
}
void bubble(int *A,int n)
{
int i,j,temp;
for(i=1;i<n;i++)
{
for(j=n-1;j>=i;j--)
{
if(A[j-1]>A[j])
{
temp=A[j-1];
A[j-1]=A[j];
A[j]=temp;
}
}
printf("\n\n Ket qua lan %d:",i);
in1(A,n);
}
}
void suibot()
{
clrscr();
int *A,n;
printf("\n SAP XEP KIEU SUI BOT\n");
printf("\n Nhap so phan tu n=");
scanf("%d",&n);
A=(int*)malloc(n*sizeof(int));
tlap(A,n);
bubble(A,n) ;
free(A);
getch();
}
//=======================================
void qs(int *A,int left,int right)
{
int i,j,x,y;
i=left;
j=right;
x=A[(left+right)/2];
do
{
while(A[i]<x&&i<right)i++;
while(A[j]>x&&j>left)j--;
if(i<=j)
{
y=A[i];
A[i]=A[j];
A[j]=y;
i++;
j--;
}
}while(i<=j);
if(left<j)qs(A,left,j);
if(i<right)qs(A,i,right);
}
void quick(int *A,int n)
{
qs(A,0,n-1);
}
void in3(int *A,int n)
{
int i;
for(i=0;i<n;i++)
printf("%5d ",A[i]);
}
void nhanh()
{
clrscr();
int *A,n;
printf("\n SAP XAP NHANH\n");
printf("\n So phan tu n=");
scanf("%d",&n);
A=(int*)malloc(n*sizeof(int));
printf("\n\n Tao lap day so:\n");
for(int i=0;i<n;i++)
{
printf("\n A[%d]=",i);
scanf("%d",&A[i]);
}
quick(A,n);
printf("\n\n");
printf("Ket qua thu duoc la:\n\n");
in3(A,n);
getch();
free(A);
}
//=======================================
void in4(int *A,int n)
{
for(int i=0;i<n;i++)
printf("%5d",A[i]);
}
void merge(int *A,int n)
{
int i,k,j,low1,up1,low2,up2,size;
int *ds;
size=1;
ds=(int*)malloc(n*sizeof(int));
while(size<n)
{
low1=0;
k=0 ;
while(low1+size<n)
{
low2=low1+size;
up1=low2-1;
if(low2+size-1<n)
up2=low2+size-1;
else
up2=n-1;
for(i=low1,j=low2;i<=up1 && j<=up2;k++)
{
if(A[i]<=A[j])
ds[k]=A[i++];
else
ds[k]=A[j++];
}
for(;i<up1;k++)
ds[k]=A[i++];
for(;j<up2;k++)
ds[k]=A[j++];
low1=up2+1;
}
for(i=low1;k<n;i++)
ds[k++]=A[i];
for(i=0;i<n;i++)
A[i]=ds[i];
size*=2;
}
printf("\n \n Ket qua thu duoc la:\n\n");
in4(A,n);
free(ds);
}
void hoanhap()
{
clrscr();
int *A,n,i;
printf("\n \t SAP XEP KIEU HOA NHAP\n");
printf("\n So phan tu n=");
scanf("%d",&n);
A=(int*)malloc(n*sizeof(int));
printf("\n Tao lap day so:\n");
for(i=0;i<n;i++)
{
printf("\nA[%2d]=",i);
scanf("%d",&A[i]);
}
merge(A,n);
printf("\n");
getch();
free(A);
}
//=======================================
void in5(int *A,int n)
{
for(int i=0;i<n;i++)
printf("%5d",A[i]);
}
void shaker(int *A,int n)
{
int i,j,temp,tdoi;
do
{
tdoi=0;
for(i=n-1;i>0;i--)
{
if(A[i-1]>A[i])
{
temp=A[i-1];
A[i-1]=A[i];
A[i]=temp;
tdoi=1;
}
}
for(j=1;j<n;j++)
{
if(A[j-1]>A[j])
{
temp=A[j-1];
A[j-1]=A[j];
A[j]=temp;
tdoi=1;
}
}
}while(tdoi);
printf("\n\n Ket qua la :",tdoi);
in5(A,n);
}
void shaker()
{
clrscr();
int *A,n,i;
printf("\n \tSHAKER_SORT\n");
printf("\n So phan tu n=");
scanf("%d",&n);
A=(int*)malloc(n*sizeof(int));
printf("\n \n Tao lap day so:\n");
for(i=0;i<n;i++)
{
printf("\n A[%2d]=",i);
scanf("%d",&A[i]);
}
shaker(A,n);
getch();
free(A);
}
//=======================================
void main()
{
while(1) {
clrscr();
int key;
printf("\n\tSAP XEP VA TIM KIEM\n");
printf("\n 1.Selection_sort\n");;
printf("\n 2.Bubble_sort\n");
printf("\n 3.Insertion_sort\n");
printf("\n 4.Quick_sort\n");
printf("\n 5.Merge_sort\n");
printf("\n 6.Shaker_sort\n");
printf("\n 0.Tro ve");
printf("\nBam mot phim de chon chuc nang:");
scanf("%d",&key);
if(key==0) break;
switch(key)
{
case 1:
clrscr();
luachon();
printf("\n\n\tAn phim bat ky de tro lai menu chinh");
getch();
clrscr();
break;
case 2:
clrscr();
suibot();
printf("\n\n\tAn phim bat ky de tro lai menu chinh");
getch();
clrscr();
break;
case 3:
clrscr();
tructiep();
printf("\n");
printf("\nAn phim bat ky de tro lai menu chinh");
getch();
clrscr();
break;
case 4:
clrscr();
nhanh();
printf("\n");
printf("\nAn phim bat ky de tro lai menu chinh");
getch();
clrscr();
break;
case 5:
clrscr();
hoanhap();
printf("\n");
printf("\nAn phim bat ky de tro lai menu chinh");
getch();
clrscr();
break;
case 6:
clrscr();
shaker();
printf("\n");
printf("\nAn phim bat ky de tro lai menu chinh");
getch();
clrscr();
break;
}
}
// getch();
}
2:Một ví dụ về Đa hình
#include <iostream.h>
#include <conio.h>
#include <math.h>
class hinhve
{
public:
virtual float dientich() = 0;
virtual char *ten() = 0;
virtual void in()=0;
};
class haichieu : public hinhve
{
public:
virtual float chuvi() = 0;
void in()
{
cout<<"ten cua hinh: "<<ten()
<<" ,dien tich la: "<<dientich()
<<" ,chu vi la: "<<chuvi()<<endl;
}
};
class bachieu : public hinhve
{
public:
virtual float thetich() = 0;
void in()
{
cout<<"ten cua hinh: "<<ten()
<<" ,dien tich la: "<<dientich()
<<" ,the tich la: "<<thetich()<<endl;
}
};
class hinhtron : public haichieu
{
private:
float r;
public:
hinhtron() { r = 0;}
hinhtron(float bk) {r = bk;}
float chuvi()
{
return 2*3.14*r;
}
float dientich()
{
return 3.14*r*r;
}
char *ten()
{
return "Hinh Tron";
}
};
class hinhvuong : public haichieu
{
private:
float a;
public:
hinhvuong(float x)
{
a = x;
}
float chuvi()
{
return a*4;
}
float dientich()
{
return a*a;
}
char *ten()
{
return "Hinh Vuong";
}
};
class tgdeu : public haichieu
{
private:
float a;
public:
tgdeu(float x) : a(x){}
float chuvi()
{
return 3*a;
}
float dientich()
{
return a*a*sqrt(3)/2;
}
char *ten()
{
return "Hinh tam giac deu";
}
};
class cau: public bachieu
{
private:
float r;
public:
cau(float bk): r(bk){}
float thetich() { return r*r*r*3.14;}
float dientich() { return 4*3.14*r*r; }
char *ten()
{
return "Hinh Cau";
}
};
class lapphuong : public bachieu
{
private:
float a;
public:
lapphuong(float x) : a(x) {}
float thetich() { return a*a*a; }
float dientich() { return 6*a*a; }
char * ten() { return "Hinh Lap Phuong"; }
};
void main()
{
hinhve *p;
p = new hinhtron(3);
p->in();
delete p;
p = new lapphuong(3);
p -> in();
delete p;
p = new cau(3);
p -> in();
delete p;
p = new tgdeu(5);
p -> in();
delete p;
p = new hinhvuong(6);
p -> in();
getch();
}
3:Tiếp một ví dụ về Đa hình
#include <iostream.h>
#include <conio.h>
#include <math.h>
class Point
{
private:
int x; int y;
public:
Point()
{
x = 0; y = 0;
}
Point(int a,int b)
{
x = a; y = b;
}
virtual void set(int a,int b)
{
x = a; y = b;
}
float gettung()
{
return y;
}
float gethoanh()
{
return x;
}
float kc(Point t)
{
return ((x - t.x)*(x - t.x) + (y - t.y)*(y - t.y));
}
virtual void in()
{
cout<<"\n("<<x<<";"<<y<<")";
}
};
class Cpoint : protected Point
{
private:
int mau;
public:
Cpoint() : Point()
{
mau = 0;
}
Cpoint(int a,int b,int mau_) : Point(a,b)
{
mau = mau_;
}
void set(int a,int b,int mau_)
{
Point::set(a,b);
mau = mau_;
}
void in()
{
Point::in();
cout<<" Co mau la "<<mau;
}
} ;
void main()
{
Point *p;
p = new Cpoint(3,5,6);
p->in();
delete p;
p = new Point(5,2);
p->in();
getch();
}
4:Tổng hai ma trận
#include <iostream.h>
#include <conio.h>
#include <stdlib.h>
void congmt(float a[][10],float b[][10],float c[][10],int hang,int cot);
void nhapmt(float a[][10],int hang,int cot);
void inmt(float a[][10],int hang,int cot);
void main()
{
system("color 3e");
float a[10][10],b[10][10],c[10][10];
int hang1,cot1;
cout<<"Moi ban nhap vao ma tran a: \n";
cout<<"Nhap vao so hang cua ma tran a: ";
cin>>hang1;
cout<<"Nhap vao so cot cua ma tran a: ";
cin>>cot1;
nhapmt(a,hang1,cot1);
inmt(a,hang1,cot1);
int hang2,cot2;
cout<<"Moi ban nhap vao ma tran b: \n";
do
{
cout<<"Nhap vao so hang cua ma tran b: ";
cin>>hang2;
}while(hang2 != hang1);
do
{
cout<<"Nhap vao so cot cua ma tran b: ";
cin>>cot2;
}while(cot2 != cot1);
nhapmt(b,hang2,cot2);
inmt(b,hang2,cot2);
cout<<"\nVay tong cua hai ma tran a,b la: \n";
congmt(a,b,c,hang1,cot1);
inmt(c,hang1,cot1);
getch();
}
void congmt(float a[][10],float b[][10],float c[][10],int hang,int cot)
{
for (int i=0; i<hang; i++)
for (int j=0; j<cot; j++)
c[i][j] = a[i][j] + b[i][j];
}
void nhapmt(float a[][10],int hang,int cot)
{
for(int i = 0;i < hang;i++)
{
for(int j = 0; j < cot; j++)
{
cout<<"Nhap vao phan tu ["<<i<<";"<<j<<"]: ";
cin>>a[i][j];
}
}
}
void inmt(float a[][10],int hang,int cot)
{
for(int i = 0; i < hang; i++)
{
for(int j = 0; j < cot; j++)
{
cout<<a[i][j]<<"\t";
}
cout<<endl;
}
}
5:Một ví dụ về sử dụng template và quá tải toán tử Nhập xuất
#include <iostream.h>
#include <stdlib.h>
#include <conio.h>
class sv
{
private :
char ten[100];
float Diem;
public:
sv()
{
Diem=0;
}
sv(char a[],float D)
{
strcpy(ten,a);
Diem=D;
}
sv(sv&a)
{
Diem = a.Diem;
strcpy(ten,a.ten);
}
void set_sv(char a[],float D)
{
strcpy(ten,a);
Diem=D;
}
float get_diem()const
{
return Diem;
}
char* get_ten()
{
return ten;
}
friend ostream&operator <<(ostream&out,sv&);
friend istream&operator>>(istream&in,sv&);
operator float()
{
return float(Diem);
}
};
ostream&operator <<(ostream&out,sv&a)
{
cout<<"\n\n\t\t\tTen "<<a.ten<<endl;
cout<<"\t\t\tDiem "<<a.Diem<<endl;
}
istream&operator>>(istream&in,sv&a)
{
cout<<"\t\t\tNhap ten ";
cin.ignore();
cin.getline(a.ten,50);
cout<<"\t\t\tNhap diem ";
cin>>a.Diem;
}
int ucln(int a,int b)
{
int r;
while(b)
{
r = a%b;
a = b;
b=r;
}
return a;
}
class phanso
{
private:
float tu,mau;
public:
phanso(float a=1,float b=1)
{
if(b)
{
tu = a;
mau = b;
}
else
{
tu =1;
mau=1;
}
}
void set_phanso(float a,float b)
{
tu =a;
mau = b;
}
void nhap()
{
cout<<"\t\t\tNhap du lieu cho phan so "<<endl;
cout<<"\t\t\tTu ";
cin>>tu;
cout<<"\t\t\tMau ";
cin>>mau;
toigian();
}
void toigian()
{
int t=ucln(tu,mau);
tu = tu/t;
mau = mau/t;
}
operator float()
{
return float(tu/mau);
}
friend ostream&operator <<(ostream&out,phanso&a);
friend istream&operator >>(istream&in,phanso&a);
};
ostream&operator<<(ostream&out,phanso&a)
{
out<<a.tu<<"/"<<a.mau<<"->";
}
istream&operator >>(istream&in,phanso&a)
{
cout<<"\t\tTu ";
cin>>a.tu;
cout<<"\t\tMau ";
cin>>a.mau;
}
template <class T,int n>
class set
{
private:
T data[n];
int spt;
public:
set()
{
spt=0;
}
set(const set&a)
{
for(int i=0;i<a.spt;i++)
data[i]=a.data[i];
spt = a.spt;
}
void them(T&a);
bool search(T&a);
friend ostream& operator<<(ostream&out,set<T,n>&a);
friend set operator +(set&a,set&b);
friend set operator *(set&a,set&b);
friend set operator -(set&a,set&b);
set operator =(const set&b)
{
for(int i=0;i<b.spt;i++)
data[i]=b.data[i];
spt=b.spt;
return (*this);
}
};
template <class T,int n>
void set<T,n>::them(T&a)
{
if(spt<n)
data[spt++]=a;
else
cout<<"\t\tMang da day rui khong them duoc nua dau "<<endl;
}
template <class T,int n>
bool set<T,n>::search(T&a)
{
for(int i=0;i<spt;i++)
if(data[i]==a)
return true;
return false;
}
template <class T,int n>
ostream&operator<<(ostream&out,set<T,n>&a)
{
if(a.spt==0)
out<<" rong "<<endl;
for(int i=0;i<a.spt;i++)
{
out<<a.data[i];
if(i<a.spt-1)
cout<<"->";
}
}
template <class T,int n>
set<T,n> operator +(set<T,n>&a,set<T,n>&b)
{
set<T,n> r(a);
for(int i=0;i<b.spt;i++)
if(!a.search(b.data[i]))
r.them(b.data[i]);
return r;
}
template <class T,int n>
set<T,n> operator -(set<T,n>&a,set<T,n>&b)
{
set<T,n> r;
for(int i=0;i<a.spt;i++)
if(!b.search(a.data[i]))
r.them(a.data[i]);
return r;
}
template <class T,int n>
set<T,n> operator *(set<T,n>&a,set<T,n>&b)
{
set<T,n> r;
for(int i=0;i<a.spt;i++)
if(b.search(a.data[i]))
r.them(a.data[i]);
return r;
}
void main()
{
set<float,100> a;
set<float,100> c;
set<float,100> d;
set<float,100> e;
set<float,100> f;
set<sv,100> g;
set<phanso,100> b;
int n,m,l;
float r;
sv A;
phanso s;
cout<<"\t\t\tNhap so luong cac so thu ";
cin>>n;
for(int i=0;i<n;i++)
{
cout<<" nhap so thu "<<(i+1)<<":";
cin>>r;
a.them(r);
}clrscr();
cout<<"\t\t\tNhap so luong phan so ";
cin>>m;
for(int i=0;i<m;i++)
{
cout<<"\t\t\tNhap phan so thu "<<(i+1)<<endl;
cin>>s;
b.them(s);
c.them(s);clrscr();
}
clrscr();
cout<<"\t\t\tNhap so luong cac sinh vien ";
cin>>l;
for(int i=0;i<l;i++)
{
cout<<"\t\t\tNhap du lieu cho sinh vien thu "<<(i+1)<<endl;
cin>>A;
g.them(A);
clrscr();
}
clrscr();
textcolor(YELLOW+RED);
cprintf("%s","\t\t\tchuong trinh da gan cac so 1 cach tu dong ta duoc ");
cout<<"\n\nday so thuc vua nhap "<<endl;
cout<<a;
cout<<"\n\nday phan so vua nhap "<<endl;
cout<<b;
cout<<"\n\tDay sinh vien vua nhap "<<endl;
cout<<g;
getch();clrscr();
d = a+c;
cout<<"\n\n hop cua hai tap hop phan so va so thuc la "<<endl;;
cout<<d;
e=a*c;
cout<<"\n\n giao cua hai tap so thuc va phan so la "<<endl;
cout<<e;
cout<<"\n\nhieu cua hai tap so thuc va phan so la "<<endl;
f=a-c;
cout<<f;
getch();
}
6:Ví dụ về quá tải toán tử
#include <iostream.h>
#include <conio.h>
#include <math.h>
class PS
{
public:
long tu,mau;
PS()
{
tu=0;
mau=0;
}
~PS(){};
int uscln(long a,long b);
void rutgon();
void nhap();
void xuat();
PS operator+(PS &a);
PS operator-(PS &a);
PS operator*(PS &a);
PS operator/(PS &a);
};
int PS::uscln(long a,long b)
{
if(a!=0 && b!=0)
{
a=abs(a);
b=abs(b);
while(a!=b)
{
if(a>b)
a=a-b;
else
b=b-a;
}
return a;
}
else
return 1;
}
void PS::rutgon()
{
int u;
u=uscln(tu,mau);
tu=tu/u;
mau=mau/u;
}
void PS::nhap()
{
Nhap:
cout<<"Nhap tu so ";
cin>>tu;
cout<<"Nhap mau so ";
cin>>mau;
if(mau==0)
{
cout<<"Mau phai khac 0"<<endl;
goto Nhap;
}
}
void PS::xuat()
{
rutgon();
if(mau<0)
{mau=-mau; tu=-tu;}
if(tu==0)
cout<<"0"<<endl;
else
if(mau==1)
cout<<tu<<endl;
else
cout<<tu<<"/"<<mau<<endl;
}
PS PS::operator+(PS &a)
{
a.tu=tu*a.mau+mau*a.tu;
a.mau=mau*a.mau;
return a;
}
PS PS::operator-(PS &a)
{
a.tu=tu*a.mau-mau*a.tu;
a.mau=mau*a.mau;
return a;
}
PS PS::operator*(PS &a)
{
a.tu=tu*a.tu;
a.mau=mau*a.mau;
return a;
}
PS PS::operator/(PS &a)
{
a.tu=tu*a.mau;
a.mau=mau*a.tu;
return a;
}
7:Đếm số lần xuất hiện của các ký tự trong chuỗi
#include <stdio.h>
#include <ctype.h>
void main()
{ char chuoi[80]; int i = 0, count = 0; printf("\nNhap vao mot chuoi bat ky : "); gets(chuoi); while (chuoi[i] != 0) { if (isalpha(chuoi[i++])) count++; } printf("So ky tu trong chuoi = %d", count); getch();}
8:Bài toán Ancarokhi
#include <stdio.h>
void main()
{ int dai, rong; printf("\nBai toan Ancarokhi : Tim dien tich hinh chu nhat co chieu dai gap hai"); printf("\nchieu rong va dien tich = chu vi"); for (dai = 1; dai < 100; dai ++) for (rong=1; rong < 100; rong++) if (dai == 2 * rong && (dai + rong)*2 == dai*rong) printf("\nDai = %d; Rong = %d", dai, rong); getch();}
9:Chứng minh đẳng thức An Casi
#include <stdio.h>
unsigned long vetrai(unsigned long n)
{ unsigned long tmp=0, i; for (i=1; i<=n; i++) tmp += i*i*i*i; return tmp;}
unsigned long vephai(unsigned long n)
{ unsigned long tmp; tmp = (long)6*n*n*n*n*n + (long)15*n*n*n*n + (long)10*n*n*n - n; tmp = tmp / (long)30 ; return tmp;}
void main()
{ unsigned long tong1, tong2, n; for (n=1; n<=50; n++) { tong1 = vetrai(n); tong2 = vephai(n); if (tong1 == tong2) { printf("\nSo %d thoa man dang thuc An Casi. ", n);printf("Tong1 = %ld - Tong2 = %ld", tong1, tong2);
} else { printf("\nSo %d khong thoa man dang thuc An Casi. ", n); printf("Tong1 = %ld - Tong2 = %ld", tong1, tong2); } } getch();}
10:Hiện bảng mã ASCII
#include <stdio.h>
#include <conio.h>
void main()
{ int i, j; clrscr();printf(" ");
for (j=0; j<16; j++) printf("%3d", j); for (i=2; i<16; i++) for (j=0; j<16; j++) { if (j == 0)printf("\n%2d ", i);
printf(" %c", i*16+j);
} getch();}
11:In ra năm âm lịch tương ứng với năm nhập vào.
#include <stdio.h>
#include <conio.h>
void main()
{ unsigned nam; char can[][5] = {"Giap", "At", "Binh", "Dinh", "Mau", "Ky", "Canh", "Tan", "Nham", "Quy"}; char chi[][5] = {"Ty", "Suu", "Dan", "Meo", "Thin", "Ty","Ngo", "Mao", "Than", "Dau", "Tuat", "Hoi"};
printf("\nNhap nam can biet : "); scanf("%d", &nam); printf("Nam am lich cua %d la %s %s", nam, can[(nam+6)%10], chi[(nam+8)%12]); getch();}
12:In ra bảng cửu chương
#include <stdio.h>
#include <conio.h>
#include <string.h>
void main()
{ int i, j;char chuoi[] = "B A N G C U U C H U O N G";
char ten[10][5] = {"","","Hai", "Ba", "Bon", "Nam", "Sau", "Bay", "Tam", "Chin"}; clrscr(); textcolor(YELLOW); gotoxy((80 - strlen(chuoi)) / 2, 1); cprintf("%s\n\n", chuoi); for (i=2; i<=9; i++) { gotoxy(10*(i-2) + (10 - strlen(ten[i]))/2, 4); textcolor(i); cprintf("%s", ten[i]); } for (j=1; j<=10; j++) for (i=2; i<=9; i++) { gotoxy(10*(i-2) + 1, j+4); textcolor(i); cprintf("%dx%2d = %2d", i, j, i*j); } getch();}
13:Nhập chuỗi và in chuỗi
#include <stdio.h>
#include <conio.h>
void main()
{ char name[80]; printf("\nXin cho biet ten cua ban : "); gets(name); printf("Chao %s\n", name); getch();}
14:Giải hệ phương trình bậc nhất.
#include <stdio.h>
#include <conio.h>
void main()
{ int a, b, c, d, e, f, dthuc; float x, y; printf("\nNhap vao cac he so a,b,c,d,e,f : "); scanf("%d%d%d%d%d%d", &a, &b, &c, &d, &e, &f); dthuc = b*d - e*a; if (dthuc != 0) { y = (float)(c*d-a*f)/dthuc; x = (float)(b*f-c*e)/dthuc; printf("Nghiem x = %f, y = %f", x, y); } else printf("\nHe phuong trinh vo ngiem."); getch();}
15:Tính thứ của ngày
#include <stdio.h>
#include <conio.h>
struct date
{int month;
int day;
int year;
} date_1;
long int funct1 (int y,int m)
{ long int result; if ( m <= 2 ) y -= 1; result = y; return (result);}
long int funct2 (int m)
{ long int result; if ( m <= 2 ) result = m + 13; else result = m + 1; return(result); }long int day_count (int m, int d, int y)
{ long int number;number = 1461 * funct1(y,m) / 4 + 153 * funct2(m) / 5 + d;
return (number); }void main ()
{ long int number_of_days1; int day_of_week;printf ("Nhap vao mot ngay (dd mm yyyy), vd 12 03 1999 \n");
scanf ("%d %d %d", &date_1.day, &date_1.month, &date_1.year); number_of_days1 = day_count (date_1.month, date_1.day, date_1.year); printf ("\nNgay la : " ); day_of_week = (number_of_days1 - 621049) % 7; switch (day_of_week) { case 0 : printf ("Chu Nhat,"); break; case 1 : printf ("Thu Hai,"); break; case 2 : printf ("Thu Ba,");break;
case 3 : printf ("Thu Tu,"); break; case 4 : printf ("Thu Nam,"); break; case 5 : printf ("Thu Sau,"); break; case 6 : printf ("Thu Bay,"); break; } getch();}
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