编译器警告字符串转换 - 是因为双引号？

Question

如果我输入5,我希望它显示"May",但他们显示的是始终警告,我怎样才能使它工作？

#include <iostream>

using namespace std;

int main() {
    int month;
    char *m_name[] = {"   ", "Jan", "Feb", "Mar", "Apr", "May",
                      "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
    cout << "Enter month: ";
    cin >> month;
    if (month >= 1 && month <= 12)
        cout << m_name[month];
    else cout << "Illegal month";
    return 0;
}

编译器警告:

main.cpp:8:70: warning: ISO C++ forbids converting a string constant to 'char*' [-Wpedantic]
                       "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
                                                                      ^
main.cpp:8:70: warning: ISO C++ forbids converting a string constant to 'char*' [-Wpedantic]
main.cpp:8:70: warning: ISO C++ forbids converting a string constant to 'char*' [-Wpedantic]
main.cpp:8:70: warning: ISO C++ forbids converting a string constant to 'char*' [-Wpedantic]
main.cpp:8:70: warning: ISO C++ forbids converting a string constant to 'char*' [-Wpedantic]
main.cpp:8:70: warning: ISO C++ forbids converting a string constant to 'char*' [-Wpedantic]
main.cpp:8:70: warning: ISO C++ forbids converting a string constant to 'char*' [-Wpedantic]
main.cpp:8:70: warning: ISO C++ forbids converting a string constant to 'char*' [-Wpedantic]
main.cpp:8:70: warning: ISO C++ forbids converting a string constant to 'char*' [-Wpedantic]
main.cpp:8:70: warning: ISO C++ forbids converting a string constant to 'char*' [-Wpedantic]
main.cpp:8:70: warning: ISO C++ forbids converting a string constant to 'char*' [-Wpedantic]
main.cpp:8:70: warning: ISO C++ forbids converting a string constant to 'char*' [-Wpedantic]
main.cpp:8:70: warning: ISO C++ forbids converting a string constant to 'char*' [-Wpedantic]

Answer 1

警告可能是因为char*.将其更改为char const*.

说明:字符串文字具有类型char const[N],其中N字符串中的字符数为+ 1,最后为NUL.通常,此类型的数组只能转换为char const*,但是存在一个特殊规则,允许将字符串文字转换char*为C兼容性.这是一种不安全的转换,因此编译器会对此发出警告.