#include <bits/stdc++.h> using namespace std; //函数的定义 int qiuhe(int x,int y){ int sum=0; for(int i=x;i<=y;i++){ sum+=i; } return sum; } int main() { int s=0,a=0,b=0; s = qiuhe(1,10); //函数的调用 cout<<s<<endl; a = qiuhe(20,30); cout<<a<<endl; b = qiuhe(35,45); cout<<b<<endl; return 0; }