ex1.c

#include <stdio.h>

int
main(int argc, char **argv)
{
  int x = 1;
  printf("Hello x = %d\n", x);

  //
  // Put in-line assembly here to increment
asm ("movl $1, %%eax;""movl %0,%%ebx;""addl %%ebx, %%eax;" :"=a" (x): "r" ( x ));                                                                                                         ;
// the value of x by 1 using in-line assembly
  //

  printf("Hello x = %d after increment\n", x);

  if(x == 2){
    printf("OK\n");
  }
  else{
    printf("ERROR\n");
  }
}