What's my error please

Question

https://code.sololearn.com/c5lxYesO2pE9/?ref=app

Answer 1

C, boolean is known as bool data type. To use boolean, a header file stdbool. h must be included to use bool in C

#include <stdio.h>
#include<stdbool.h>

int main() {
bool b = true;
char c = 'A';

printf(" bool + char : %c ", b+c);
c=b+c;

return 0;
}