Why is this null termination in c++ char array not recognized

Question

I have a very simple C++ code like so:

#include <iostream>
using namespace std;

int count_occurrences(char *pc, char c) {
    int count = 0;
    while (pc != '\0') {
        if (*pc == c) {
            ++count;
        }
        ++pc;
    }
    return count;
}

int main() {
    char v[6] {'h', 'e', 'l', 'l', 'o', '\0'}; 
    cout << "Total occurence of  'a'" << count_occurrences(&v[0], 'l');
}

The char array is null terminated, however the while (pc != '\0') is not able to detect the null placed at the end of the character array. I have tried while (pc != NULL) and while (pc != nullptr) but no luck.

I think you're confusing the null character ('\0') with the null pointer. A pointer to the null character is not the same thing as a null pointer. — molbdnilo
– molbdnilo, Commented May 18, 2021 at 11:38
@sshekhar1980 You should consider upgrading your compiler. GCC 5 was released 6 years ago. — eerorika
– eerorika, Commented May 18, 2021 at 11:40

Janbres Gagaracruz · Accepted Answer · 2021-05-18 11:18:40Z

2

try to check this out this

while(*pc != '\0')

answered May 18, 2021 at 11:18

Janbres Gagaracruz

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