CareerCup

int strlenu(char *t)
{int count=0;
while(*t++)count++;
return count;
}

the condition should be while(*p), otherwise it wont work.

int
Strlen(const char *str)
{
    const char *ptr = str;

    while (*++ptr)
        ;

    return ptr - str;
}

need to compare with the '\0'

int strlen(char *str){
          char *p = NULL;

          p = str;
          while (p) p++;

         return p - str;
    }