freopen

#include<stdio.h>

int main()

{

    freopen("in.txt","r",stdin);/*如果in.txt不在连接后的exe的目录，需要指定路径如D:\\in.txt*/

    freopen("out.txt","w",stdout);/*同上*/

    inta,b;

    while(scanf("%d%d",&a,&b)!=EOF)

    printf("%d\n",a+b);

    fclose(stdin);

    fclose(stdout);

    return0;

}

 

freopen("E:\\Context_aware\\sotongTest\\sotongTest\\Debug\\sample_input.txt", "r", stdin);

 

0 0 0 0 0 0 0 0 0
1 0 2 0 1 0 1 0 0
0 2 0 0 0 0 0 0 0
0 0 1 0 0 0 0 0 0
0 0 0 0 1 0 2 0 0
0 0 0 0 0 0 0 0 0
0 0 2 1 0 0 1 0 0
0 0 1 2 2 0 2 0 0
0 0 0 0 0 0 0 0 0