#include<stdio.h>

int abc(int x);
int main()
{
	int x;
	printf("f(x) = x2 + 2x + 3 if x < 0 \nf(x) = 0           if x = 0\nf(x) = x - 2       if x > 0");
	printf("\nEnter number :");
	scanf("%d",&x);
	abc(x);
	return 0;
}
int abc(int x)
{
	int y;
	if(x<0){
		printf("f(x) = x2 + 2x + 3\nf(%d) = %d",x,(x*x)+(x*2)+3); 	
	}
	else if(x==0){
		printf("f(x) = 0 \nf(%d) = %d",x,0);
	}
	else{
		printf("f(x) = x - 2 \nf(%d) = %d",x,x-2);
	}
}