c++ , size, length

# include <iostream>

# include <string>

int main(void) {

std::string s("My name is Kim Jun Hyeon");

int s_(s.size());

int l_(s.length());

int i; // index

for (i = 0; i < l_; i++) {

std::cout << i << " => " << s[i] << std::endl;

}

std::cout << s_ << std::endl;

std::cout << l_ << std::endl;

return 0;

}

[c언어] ====================================================

# include <stdio.h>

# include <string.h>

int main(void) {

char s[] = "hello world";

int length_ = strlen(s);

printf("%d \n", length_);

return 0;

}