May 15, 2008

C++

A矩陣
1 2

3 4
#include
#include
void main()
{
int A[2][2],B[2][2],C[2][2];
int sum=0;
for(int i=0;i<2;i=i+1)
{
for(int j=0;j<2;j=j+1)
{
scanf("%d",&A[i][j]);
printf("%d\n",A[i][j]);
}
}
for(int i=0;i<2;i=i+1)
{
for(int j=0;j<2;j=j+1)
{
printf("%d\t",A[i][j]);
}
printf("\n\n");
}
system("pause");
}
====================================================
#include
#include
void main()
{
int A[2][2],B[2][2],C[2][2];
int sum=0;
for(int i=0;i<2;i=i+1)
{
for(int j=0;j<2;j=j+1)
{
scanf("%d",&A[i][j]);
printf("%d\n",A[i][j]);
}
}

for(int i=0;i<2;i=i+1)
{
for(int j=0;j<2;j=j+1)
{
scanf("%d",&B[i][j]);
printf("%d\n",B[i][j]);
}
}

for(int i=0;i<2;i=i+1)
{
for(int j=0;j<2;j=j+1)
{
printf("%d\t",A[i][j]);
printf("%d\t",B[i][j]);
}
printf("\n\n");
}
system("pause");
}
==================================================
#include
#include
void main()
{
int A[2][2],B[2][2],C[2][2];
int sum=0;
for(int i=0;i<2;i=i+1)
{
for(int j=0;j<2;j=j+1)
{
scanf("%d",&A[i][j]);
printf("%d\n",A[i][j]);
}
}

for(int i=0;i<2;i=i+1)
{
for(int j=0;j<2;j=j+1)
{
scanf("%d",&B[i][j]);
printf("%d\n",B[i][j]);
}
}

for(int i=0;i<2;i=i+1)
{
for(int j=0;j<2;j=j+1)
{
sum=0;
for(int k=0;k<2;k=k+1)
{
sum=sum+A[i][k]*B[k][j];
}
C[i][j]=sum;
}
}
for(int i=0;i<2;i=i+1)
{
for(int j=0;j<2;j=j+1)
{
printf("%d\t",C[i][j]);
}
printf("\n\n");
}
system("pause");
}
===============================================================
質數
#include
#include
void main()
{
int N=100;
for(int i=2;i















#include
void main()
{
int N=1000000;
int flag;
for(int i=2; i




















#include
void main()
{
int N=100;
int flag;
for(int i=2; i

















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