程序代码：

int my_strlen(char* str)
{
    char* start = str;
    char* end = str;//此处逐步操作时报错
    while (*end != '\0');
    {
        end++;
    }
    return end - start;
}
int main()
{
    char arr[] = "bit";
    int len = my_strlen(arr);
    printf("%d\n", len);
    printf("hello");
    return 0;
}