Why there is an error at line foo[0]=1? Should it be foo[0]="1"?

Question

include <stdio.h>

int main() {
const char* foo="hi";
foo="hello";
foo[0]=1;

return 0;
}

Answer 1

You declared foo as pointing to a const char, so you can't change it.

Answer 2

foo is an const char array, so firstly you can’t change it, and secondly 1 is not a char; it is an integer, so there will be errors.