C语言文件写入运用

#include<stdio.h> int main () { /* freopen("input.txt", "r", stdin); freopen("output.txt", "w", stdout); int a; scanf("%d", &a); printf(,"%d",a);*/ /* FILE *fin, *fout; fin = fopen("input.txt", "rb"); fout = fopen("output.txt", "wb"); int a; fscanf(fin, "%d", &a); fprintf(fout ,"%d",a); fclose(fin); fclose(fout); */ return 0; }