三阶矩阵的乘法(C语言从文件中读入)

#include"stdio.h"

#include"stdlib.h"

using namespace std;

void display(int A[3][3]){

for (int i = 0; i <3 ; ++i) {

for (int j = 0; j < 3; ++j) {

printf("%d ",A[i][j]);

}

printf("\n");

}

printf("\n");

}

int main()

{

int A[3][3] ,B[3][3];

int result[3][3];

FILE *fp1=fopen("D:\\A.txt","rt");

if(fp1==NULL)

{

printf("oh shit!cannot open file A");

result -1;

}

for(int i = 0; i<3; ++i)

{

for(int j = 0;j<3;++j)

{

fscanf(fp1,"%d",&A[i][j]);

}

fscanf(fp1,"\n");

}

fclose(fp1);

FILE *fp2=fopen("D:\\B.txt","rt");

if(fp2==NULL)

{

printf("oh shit! cannot open file B.\n");

return -1;

}

for(int i = 0; i <3; ++i)

{

for(int j = 0;j<3;++j)

{

fscanf(fp2,"%d",&B[i][j]);

}

fscanf(fp2,"\n");

}

fclose(fp2);

for(int i = 0;i < 3; ++i)

{

for(int j = 0; j<3 ; ++j)

{

result[i][j]=A[i][j]*B[i][j];

}

}

printf("Matrix_A:\n");

display(A);

printf("Matrix_B:\n");

display(B);

printf("Matrix_A * Matrix_B = \n");

display(result);

return 1;

}