#include <stdio.h>
#include <math.h>

int main(void)
{
  int temp, x;
  
	printf("What is the temperature? ");
	scanf("%d", &temp);

	/* Example 1: single statement to execute */
		
	if (temp >= 20)
		printf("The temperature is warm\n\n");
	else
		printf("The temperature is cool\n\n");
		
	/* Example 2: use braces to build a compound statement to execute */
	
	if (temp >= 20)
	{ /* open brace */
		printf("condition is true, so we execute the _true_ branch\n");
		printf("The temperature %d is warm\n", temp);
	} /* close brace */	
	else
		{ 
		printf("condition is false, so we execute the _false_ branch\n");
		printf("The temperature %d is cool\n", temp);
		}
		
	/* Example 3: use multiple branching */
	
	printf("Enter any integer number =\n");
	scanf("%d", &x);
	
	if (x > 0)	
		printf("%lf\n", sqrt(x));		
	else   /* either x is 0 or it is negatiuve */ 
		{ 	if (x == 0)
				printf("Square root of 0 equals 0\n");
			else 
				printf("%lf\n", sqrt(-x));
		}
return(0);
}