>>7
良くわからないけど,こんな感じ？
#include <stdio.h>
int main(int argc, char** argv)
{
FILE* in = fopen(argv[1], "rb");
FILE* out = fopen(argv[2], "wb");
int a, b;
while(fscanf(in, "%d%d", &a, &b) > 0) {
fprintf(stdout, "wa:%d\nsa:%d\nseki:%d\nshou:%lf\namari:%d\n",
a + b, a - b, a * b, (double)a / b, a % b);
fprintf(out, "wa:%d\nsa:%d\nseki:%d\nshou:%lf\namari:%d\n",
a + b, a - b, a * b, (double)a / b, a % b);
}
fclose(in);
fclose(out);
return 0;
}