Implement Custom strlen Function

Code

#include <stdio.h>

int custom_strlen(const char *str) {
    const char *str_cpy;
    int len = 0;

    for (str_cpy = str; *str != '\0'; str++) {
        len++;
    }

    return len;
}

int main() {
    char str[101];
    fgets(str, sizeof(str), stdin);

    // Remove newline if present
    int i = 0;
    while (str[i] != '\0') {
        if (str[i] == '\n') {
            str[i] = '\0';
            break;
        }
        i++;
    }

    printf("%d", custom_strlen(str));
    return 0;
}

Solving Approach