sankakkei

sankakkei.c

#include<stdio.h>
double sankakkei_menseki(double teihen, double takasa);
double enmenseki(double hankei);
double enchuu_taiseki(double teimenseki, double takasa);

int main(){
  printf("%5.2f\n", sankakkei_menseki(5.0, 4.0));
  printf("%5.2f\n", enmenseki(5.0));
  printf("%5.2f\n", enchuu_taiseki(5.0, 10.0));
  printf("%5.2f\n", enchuu_taiseki(enmenseki(5.0),10.0));
}

double sankakkei_menseki(double teihen, double takasa){
  return (teihen * takasa / 2.0);
}

double enmenseki(double hankei){
  return (hankei * hankei * 3.14);
}

double enchuu_taiseki(double teimenseki, double takasa){
  return (teimenseki * takasa);
}