磁盘的数据文件名写错了,应该是walk.in,而不是walk.in.txt,因为代码中打开的是文件walk.in。
测试如下:
参考链接:
#include <iostream>
using namespace std;
int zs=0;
int main(void){
// https://www.runoob.com/cprogramming/c-function-freopen.html
freopen("walk.in","r",stdin);
freopen("walk.out","w",stdout);
int a,b;
cin>>a>>b;
cout<<a;
fclose(stdin);
fclose(stdout);
return 0;
}