#include <stdio.h>

int my_strlen(char* str)
{
    int count = 0;
    while(*str != '\0')
    {
        count++;
        str++;
    }
    return count;
}



int main() {
    
    char arr[]="nicjci";
    int len = my_strlen(arr);
    printf("len = %d\n",len);
	return 0;
}