Question

关于C++中while的问题，不知道哪错了，总是一直输出答案，根本停不下来。。。求大神指点啊

#include<iostream>using namespace std;int main(){ int a, b, c; cin >> a >> b; if (a % 4 == 0) { while (b==2) cout << "February" << " " << a << " " << "has 29 days" << endl; return 0; while (b == 1) cout << "January" << " " << a << " " << "has 31 days" << endl; return 0; while (b == 3) cout << "March" << " " << a << " " << "has 31 days" << endl; return 0; while (b == 4) cout << "Apri" << " " << a << " " << "has 30 days" << endl; return 0; while (b == 5) cout << "May" << " " << a << " " << "has 31 days" << endl; return 0; while (b == 6) cout << "June" << " " << a << " " << "has 30 days" << endl; return 0; while (b == 7) cout << "July" << " " << a << " " << "has 31 days" << endl; return 0; while (b == 8) cout << "August " << " " << a << " " << "has 31 days" << endl; return 0; while (b == 9) cout << "September" << " " << a << " " << "has 30 days" << endl; return 0; while (b == 10) cout << "October" << " " << a << " " << "has 31 days" << endl; return 0; while (b == 11) cout << "November " << " " << a << " " << "has 30 days" << endl; return 0; while (b == 12) cout << "December" << " " << a << " " << "has 31 days" << endl; return 0; } else if (a % 4 != 0) { while (b == 2) cout << "February" << " " << a << " " << "has 28 days" << endl; return 0; while (b == 1) cout << "January" << " " << a << " " << "has 31 days" << endl; return 0; while (b == 3) cout << "March" << " " << a << " " << "has 31 days" << endl; return 0; while (b == 4) cout << "Apri" << " " << a << " " << "has 30 days" << endl; return 0; return 0; while (b == 5) cout << "May" << " " << a << " " << "has 31 days" << endl; return 0; while (b == 6) cout << "June" << " " << a << " " << "has 30 days" << endl; return 0; while (b == 7) cout << "July" << " " << a << " " << "has 31 days" << endl; return 0; while (b == 8) cout << "August " << " " << a << " " << "has 31 days" << endl; return 0; while (b == 9) cout << "September" << " " << a << " " << "has 30 days" << endl; return 0; while (b == 10) cout << "October" << " " << a << " " << "has 31 days" << endl; return 0; while (b == 11) cout << "November " << " " << a << " " << "has 30 days" << endl; return 0; while (b == 12) cout << "December" << " " << a << " " << "has 31 days" << endl; return 0; } return 0;}

Answer 1

你把所有的while改为if就可以了，或在每个while语句块中假如break;