Random variable difficulties

[jgilv]

I am having trouble running the following code. I am getting a message segmentation fault (core dumped)

#include<stdio.h>
#include<ctype.h>
#include<time.h>


main()


{


int iuser;
int irand;
srand(time(NULL));


irand = (rand() % 10) + 1;




  printf("Guess a Number: ");
  scanf("%f", &iuser);
  
  if ( isdigit(iuser) == 0)
  {
     printf("Please enter a number next time.");
 }
  else
     {
     if ( iuser == irand )
     printf("Woot Woot you got it right.");
     
     else 
     printf("sorry you lost.");
}


getchar();
getchar();
getchar();


}

[c99tutorial]

Try compiling with a higher warning level. You have some problems:

1. main needs a return type and arguments
2. you didn't include a header file for srand and rand (hint: it is in stdlib.h)
3. scanf is using the wrong format
4. isdigit expects that you give it a character like 'a' 'b' '5' etc, and tells you whether that single character is a digit

[Tclausex]

Turn on your compiler warnings, then fix errors.