C++中const char[] 为什么不能用strlen()?

Question

如题所示，为什么字符串加了const就会报错，去掉const就能过？

#include <iostream>
#include <stdio.h>
#include <string.h>

using namespace std;

int main()
{
    const char letter[] = "`1234567890-=QWERTYUIOP[]\\ASDFGHJKL;'ZXCVBNM,./";

    cout<<strlen(letter)<<endl;

    return 0;
}

Answer 1

Post the error message and take a look. It is normal to execute the following command under Mac and Centos after compilation

g++ test.cpp -o test
./test

Answer 2

What compiler are you using? GCC 6.2 works fine.

Answer 3

Thank you everyone, I made a mistake in the main function. I created two new main functions in a project, which caused this error. Thank you very much