No startup error

Question

I’m having a non-boot error, and I can’t figure out why:

#include <stdio.h>
int main(){
  const int LENGTH = 10;
  const int WIDTH = 5;
  const char NEWLINE = "\n";
  int area;
  area = LENGHT * WIDTH;
  printf("Value of area : %d", area);
  printf("%c", NEWLINE);
  return 0;
}

Mistakes:

C:\Users\zegla\OneDrive\Ambiente de Trabalho\Cexs\trainning6_const.c: In function 'main':
C:\Users\zegla\OneDrive\Ambiente de Trabalho\Cexs\trainning6_const.c:6:24: warning: initialization makes integer from pointer without a cast [-Wint-conversion]
   const char NEWLINE = "\n";
                        ^
C:\Users\zegla\OneDrive\Ambiente de Trabalho\Cexs\trainning6_const.c:9:10: error: 'LENGHT' undeclared (first use in this function)
   area = LENGHT * WIDTH;
          ^
C:\Users\zegla\OneDrive\Ambiente de Trabalho\Cexs\trainning6_const.c:9:10: note: each undeclared identifier is reported only once for each function it appears in

Answer 1

It has two errors, one is typing, the variable LENGTH is spelled wrong.

The other mistake is that you’re trying to save an address for a string in a variable that is not a string. She would need to be a pointer to bear what she desires.

#include <stdio.h>
 
int main(){
    const int LENGTH = 10;
    const int WIDTH = 5;
    const char *NEWLINE = "\n";
    int area;
    area = LENGTH * WIDTH;
    printf("Value of area : %d", area);
    printf("%c", NEWLINE);
    return 0;
}

Behold working in the ideone. And in the repl it.. Also put on the Github for future reference.

Nos Ides online I did a little better and different in each case.

It’s not usually done that way, although all this code is unnecessary, so it’s even complicated to say what could be better, since it would be better to do everything differently. It can end up getting programming addictions doing this way. This code produces the same result with a line.