Function does not return printf

Question

when I run this program it prints the question and it gets the answer from the user, but it does not say if it's correct or false. Please help!

#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <stdio.h>

void
correct (char str[])
{
    char c1 = "Cristoforo";
    char c2 = "cristoforo";
    char c3 = "CRISTOFORO";
    int conf = strcmp (str, c1);
    int conf1 = strcmp (str, c2);
    int conf2 = strcmp (str, c3);
    if (conf1 == 0 || conf == 0 || conf2 == 0)
    {
        printf ("The answer is correct");
    }
    else
    {
        printf ("The answer is wrong");
    }
}

int
main ()
{
  char s[] = "What's the name of the explorere Colombus?\n";
  char r[100];
  printf ("%s", s);
  gets (r);
  void correct (r);
}

Answer 1

void correct(r) is declaration and it means - correct is a function that takes r type in arguments and returns void. Just remove void to call function. correct(r) . And you need to change char s to char * or const char* .

    const char *c1 = "Cristoforo";
    const char *c2 = "cristoforo";
    const char *c3 = "CRISTOFORO";

Answer 2

You are getting a seg fault due to incorrect use of strcmp() . The second parameter is required to be a const char *__s2 . So what would be right is:

int conf = strcmp(str, "Cristoforo");
int conf1 = strcmp(str, "cristoforo");
int conf2 = strcmp(str, "CRISTOFORO");

and also remove void when calling correct(r)