#include <stdio.h> 
#include <conio.h>
main() { 
int a;
printf("Program : Plas minus numbers");
printf("\ninput number = "); 
scanf("%d",&a); 
if(a==0){ 
printf("Program : Plas minus numbers");
float a,b,c;
	printf("\nInput a :");
	scanf("%f",&a);
	printf("\nInput b :");
	scanf("%f",&b);
	c = a+b;
	printf("\nResult : %.2f",c);
	printf("\nBy Supichaya sangnago NO.27");
} 
else{ 
float a,b,c;
	printf("Input a :");
	scanf("%f",&a);
	printf("\nInput b :");
	scanf("%f",&b);
	c = a-b;
	printf("\nResult : %.2f",c);
	printf("\nBy Supichaya sangnago NO.27");
} 
}