strlen.c

#include <stdio.h>
#include <string.h>
// hello.exe -p -q
unsigned int strlen_k(const char* string);
int main(int argc, char** argv)
{
    const int i = 4;

    const char* string = "this";
    char str[] = "this";
    char str1[] = { 't', 'h', 'i', 's', '\0' }; // \0 is important

    printf("%zu\n", strlen_k(string));
    printf("%zu\n", strlen_k(str));
    printf("%zu\n", strlen_k(str1));

    printf("argc = %d\n", argc);

    for (int i = 0; i < argc; i++)
    {
        printf("%s\n", argv[i]);
    }

    string = "hello";

    return 0;
}

unsigned int strlen_k(const char* string)
{
    unsigned int count = 0;

    while (string[count] != '\0')
    {
        count++;
    }
    return count;
}