WAP to find the distance between two points (x1,y1) and (x2,y2).

// WAP to find the distance between two points (x1,y1) and (x2,y2).
 
#include<stdio.h>  
#include<conio.h>
#include<math.h>
void main()  
{  
int x1,y1,x2,y2;
float a=0,b=0,d=0;
clrscr();  
printf("Enter x1:\n"); 
scanf("%d",&x1); 
printf("Enter y1:\n");
scanf("%d",y1);
printf("Enter x2:\n");
scanf("%d",x2);
printf("Enter y2:\n");
scanf("%d",y2);
a=x2-x1;
b=y2-y1;
d=sqrt(a*a+b*b);
printf("Distance = %f",a);  
getch();  
}