שפת C/פעולות חשבוניות/תרגילים

#include <stdio.h>
 
int main()
{
	int x;
int y;
	scanf("%d %d", &x, &y);
	printf("%d + %d = %d\n", x, y, x + y);
	return 0;
}

#include <stdio.h>
 
int main()
{
	float x, y;
	scanf("%f %f", &x, &y);
	printf("%f + %f = %f\n", x, y, x + y);
	return 0;
}

#include <stdio.h>
 
int main()
 
{
 
	float radius,perimeter,s;
	const float PI=3.14153265;
 
	printf("enter radius\n");
	scanf("%f",&radius);
 
	perimeter=radius*2*PI;
	s=radius*radius*PI;
 
	printf("perimeter is %f Area is %f\n",perimeter,s);
 
	return 0;
}

#include <stdio.h>
 
int main()
{
//sum is the sum of the grades, and amount is the amount of grades
  float sum=78+84+45+97+64;
 int amount=5; 
  float average=(float) sum/amount;
  printf("%f\n", average);
  return 0;
}