Leave out parts of hello world and record the errors

Source:

#include "stdio.h"

int main()
{
  printf("Hello, world!");
  return 0;
}

Answer:

## remove double quote
main.c:5:10: warning: missing terminating " character
main.c: In function ‘main’:
main.c:5: error: missing terminating " character
main.c:6: error: expected expression before ‘return’
main.c:7: error: expected ‘;’ before ‘}’ token

## remove semicolon
main.c: In function ‘main’:
main.c:6: error: expected ‘;’ before ‘return’

## remove return 0
no error! (good job compiler!)