#include<iostream> using namespace std; int sum(int x,int y); int main(){ int a,b,s; cout<<"enter two number"<<endl; cin>>a>>b; s=sum(a,b); cout<<"the sum of a and b"<<s<<endl; return 0; } int sum(int x,int y){ return x+y; }
原文：http://www.cnblogs.com/sanyeai/p/7795350.html