c++ - 我可以将 char*(月份)与字符串(二月)进行比较吗？如果没有，我该怎么做呢？

Question

我希望该程序能够运行，以便我可以将任何措辞的月份转换为其等效数字。

#include <iostream>
using namespace std;

int main()
 {
   char month[20];
   int INT_month;

   cout << "Enter a month: (ex. January, February)";
   cin >> month;  // Let's say the input is February

   if (month == "February")
       INT_month = 2; 

   cout << "The month in its' integral form is " << INT_month << endl;
                                  // INT_month = 2130567168 // WHY DOES IT DO THIS????

   return 0;
 }

Answer 1

一种方法是创建月份名称的 vector，并使用查找索引加一作为月份编号:

vector<string> months = {
    "january", "february", "march", ...
};
string search = "march";
auto pos = find(months.begin(), months.end(), search);
if (pos != months.end()) {
    cout << "Month number: " << distance(months.begin(), pos) + 1 << endl;
} else {
    cerr << "Not found" << endl;
}

这会打印 3 ( demo on ideone )。