recursive strlen

gistfile1.cpp

#include <cstdio>

int my_strlen(char* str) {
	if (*str == 0)
		return 0;
	else
		return my_strlen(str + 1) + 1;
}

int main() {
	char str[] = "Hello, world!";
	int len = my_strlen(str);

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

	return 0;
}