我，新秀答案共享师（编程地板砖），期待你滴官主（和赞）。（acgo觉得很赞）

#include<bits/stdc++.h> using namespace std; int main() { int n; cin>>n; int a[13]={0,31,28,31,30,31,30,31,31,30,31,30,31}; int c=0; for(int i=1;i<=12;i++) { if((12+c+n)%7 == 5) cout<<i<<endl; c+=a[i]; } return 0; }

这一题只有7种输入，用switch判断一下就可以了。

#include<iostream> using namespace std; int main(){ int n; cin >> n; int m=1,d=1; while (true){ d++; n++; if (d == 13&&n%7 == 5) cout << m << endl; if ((m == 1||m == 3||m == 5|| m== 7||m == 8||m == 10||m == 12)&&d>31){ d=1; m++; } else if ((m == 4 || m == 6||m == 9||m == 11)&&d>30){ d=1; m++; } else if (m==2&&d>28){ d=1; m++; } if (m>12) break; } return 0; }

#include<bits/stdc++.h> using namespace std; int main() { int n; cin>>n; }

#include <bits/stdc++.h> using namespace std; int a[13]={0,31,28,31,30,31,30,31,31,30,31,30,31}; int main(){ int w,day=1,month=1; cin>>w; for(int i=2;i<=365;i++) { day++; if(day>a[month]) day=day%a[month],month++; w++; if(w>7) w=(w++)%7; if(day13&&w5) cout<<month<<endl; } return 0; }

#include<bits/stdc++.h> using namespace std; int main() { int n; cin>>n; int a[13] = {0,31,28,31,30,31,30,31,31,30,31,30,31}; int s = 0; for(int i=1;i<=12;i++) { if((12+s+n) %7 == 5) cout<<i<<endl; s+=a[i]; } }

#include<bits/stdc++.h> using namespace std; int main() { int n; cin>>n; }