How to fix segmentation fault in Linux?

Question

linux

Debian of some devil gives a segmentation fault when running a simple program. How to remove this error?
Even such a simple program he cuts at the start:

#include <stdio.h>
int main(){
  printf("Hello\n");
  int a,b;
  printf(" vvedite chislo a:");
  scanf("%d",a);
  printf("\n vvedite chislo b:");
  scanf("%d",b);
printf("%d, %d",a,b);
}

Answer 1

scanf("%d",a);
измените на
scanf("%d",&a);
и
scanf("%d",b);
на
scanf("%d",&b);