How to compare strings in c++

how do you compare strings using only one header file i.e. #include<cstdio>
Im a noob so i might get stuff wrong sorry.
Why doesnt this work:

Code:

int i= 0;
int check=5;
while(a[i]==b[i]){
i++;
}
if(i==check){
printf("yess");
}else{
printf("nooo")

i think

Code:

int i = 0;
while (a[i] && b[i] && b[i] == a[i])
    i++;
if( a[i] == b[i])
    printf("yess");
else
    printf("nooo")

Originally Posted by Sanscorp1999

how do you compare strings using only one header file i.e. #include<cstdio>

Considering that <cstdio> is not about std::string objects or null terminated strings, it sounds like you are really asking how to write a function to compare two null terminated strings, without calling any standard library function in its implementation.

Originally Posted by Sanscorp1999

Why doesnt this work:

You should provide the smallest and simplest compilable program that demonstrates the problem and tell us how does it not work. That said, linhlonet has a made what I believe is a good guess in post #2, but you really should leave us guessing like that.

And why are you using printf?