program2_09.c

来自「C语言入门经典一书的所有代码。书上面的所有代码均在此。希望大家喜欢」· C语言 代码 · 共 22 行

/* Program 2.9 More round tables */
#include <stdio.h>
#define PI   3.14159f                  /* Definition of the symbol PI */

int main(void)
{
  float radius = 0.0f;
  float diameter = 0.0f;
  float circumference = 0.0f;
  float area = 0.0f;

  printf("Input the diameter of a table:");
  scanf("%f", &diameter);
  radius = diameter/2.0f;
  circumference = 2.0f*PI*radius;
  area = PI*radius*radius;
  printf("\nThe circumference is %.2f", circumference);
  printf("\nThe area is %.2f", area);
  return 0;
}