阅读程序写结果:

#include<iostream> using namespace std; void foo(int a, int b, int c) { if(a > b) foo(c, a, b); else cout<<a<<','<<b<<','<<c<<endl; } int main() { int a, b, c; cin >> a >> b >> c; foo(a, b, c); return 0; }

输入: 3 1 2