#includeusing namespace std;void swap(int& a, int& b){int t;t = a;a = b;b = t;}int main(){int a, b;cin >> a >> b;swap(a, b);cout << a << "," << b << endl;return 0;}输入4,5输出却是0,4 哪里有错
以空格分割输入不要加逗号
a,b=b,a