need help with validation

[Enig.Ma]

#include <stdio.h> 

int main(void)
{
  int ch;
  printf ("Press [Enter] to continue");
  while ((ch = getchar()) != '\n' && ch != EOF);
  return(0);
}

yeah, my problem here, is to make sure that a user enters an integer only...

browsing thru the forum, that code stood out... using the getchar() function..

could you tell me what i would do in the while loop to make sure a user enters an integer only?

thx.

could u explain what EOF means too?


2nd question..


lets say, my global variable is work_pay, it is a global variable because i want to access it in a few functions.


how would i assign the value of work_pay from function1, so i can access it in functions 2 and 3?

is it possible?

edit.. i htink i solved it, heres my code...

#include <stdlib.h>
#include <stdio.h>
#include <time.h>
#include <math.h>
#include <string.h>

int work_pay;
int work_pay2;

void func1();
void func2();

int main()
{
    int count;
    
    func2(); // print data.
    
    func1(); //data entered
    func2(); //print new data
    
    


    system("PAUSE");
    return 0;
}


void func1(){
     
     int ans, ans1;
     
     printf("Enter a number for work_pay: ");
     scanf("%d",&ans);
     
     printf("enter a number for work_pay2: ");
     scanf("%d",&ans1);
     
     work_pay = ans;
     work_pay2 = ans1;
}

void func2(){
     
     printf("work_pay is: %d\n\n",work_pay);
     printf("work_pay2 is: %d\n\n",work_pay2);
}

[Antigloss]

int num, ch;
while ( scanf("%d", &num) != 1 ) {
    while ((ch = getchar()) != '\n' && ch != EOF);
    printf("input again\n");
}