[Help] Strings in C

Code:

---

#include <stdio.h>


int main() {
    char str3[6] = {'h', 'e', 'l', 'l', 'o', '\0'};
    char str4[ ] = {'h', 'e', 'l', 'l', 'o'};
    printf("%s, %s", str3, str4);
   
    return 0;
}

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The output to this program is hello, hellohello
why does it print that instead of hello, hello ?

Because str4 doesn't have a \0 to mark the end of the string.

So printf just keeps running through memory until it finds a \0.

In your case, that just happened to be your str3.

But it could have just as easily printed any random memory contents until it found a \0 (or crashed).