//关于freopen的stdin和stdout的使用 //加快输入和输出速度 #include <stdio.h> int main() { #ifndef ONLINE_JUDGE//起始(online_judge在线测评系统) freopen("4139.txt","r",stdin); freopen("self.txt","w",stdout); #endif//结束 int n,m; char a[20]="Hello,world!"; scanf("%d%d",&n,&m); printf("%s\n%d\n%d",a,n,m); return 0; }