C求圆、梯形、三角形的面积和一元二次方程的根（实虚）
文件列表：
circle.c
circle.h
display.c
display.h
equation.c
equation.h
main.c
menu.c
menu.h
trape.c
trape.h
trangle.c
trangle.h
----------------------------------------------------------------------------
circle.c
#include
#define PI 3.141
double circle_cacl(double radius);
void circle_output(void);
void run_circle(void);
/*
void main()
{
run_circle();
}
*/
double circle_cacl(double radius)
{
return PI*radius*radius;
}
void circle_output(double radius)
{
if(radius>0)
{
printf("the circle arae is %lf\n",circle_cacl(radius));
}
else
{
printf("pleased input the radius than bigger 0\n");
}
}
void run_circle()
{
double radius;
printf("Input the circle radius:");
scanf("%lf",&radius);
circle_output(radius);
}
circle.h
#ifndef _CIRCLE_H
#define _CIRCLE_H
extern double circle_cacl(double radius);
extern void circle_output(double radius);
extern void run_circle(void);
#endifdisplay.c
#include
void display(void);
void run_display(void);
void main()
{
run_display();
}
void display(void)
{
printf("\t**********COMPUTE SYSTEM***********\t\n");
printf("\t-----1.Compute the circle area-----\t\n");
printf("\t-----2.Compute the trape area-----\t\n");
printf("\t-----3.Compute the triangle area-----\t\n");
printf("\t-----4.Compute the equation root-----\t\n");
printf("\t-----0.Exit the COMPUTE SYSTEM-------\t\n");
printf("\t**************END******************\n");
}
void run_display(void)
{
display();
} display.h
#ifndef _DISPLAY_H
#define _DISPLAY_H
extern void display(void);
extern void run_display(void);
#endifequation.c
#include
#include
double calc_equation_delt(double a,double b,double c);
void calc_equation_real_root(double a,double b,double c);
void calc_equation_vir_root(double a,double b,double c);
void equation_output(double a,double b,double c);
void run_equation(void);
/*
void main()
{
run_equation();
}
*/
void run_equation(void)
{
double a, b, c;
printf("The equation a:");
scanf("%lf",&a);
printf("The equation b:");
scanf("%lf",&b);
printf("The equation c:");
scanf("%lf",&c);
equation_output(a,b,c);
}
double calc_equation_delt(double a,double b,double c)
{
return b*b-4*a*c;
}
void calc_equation_real_root(double a,double b,double c)
{
double q,p,delt;
p=-b/2*a;
delt=calc_equation_delt(a,b,c);
q=sqrt(delt)/2.0*a;
printf("The real_root_1=%lf+%lf\n",p,q);
printf("The real_root_2=%lf-%lf\n",p,q);
}
void calc_equation_vir_root(double a,double b,double c)
{
double q,p,delt;
p=-b/2*a;
delt=abs(calc_equation_delt(a,b,c));
q=sqrt(delt)/2.0*a;
printf("The vir_root_1=%lf+%lfi\n",p,q);
printf("The vir_root_2=%lf-%lfi\n",p,q);
}
void equation_output(double a,double b,double c)
{
if(a!=0.0)
{
if(calc_equation_delt(a,b,c)>=0)
{
calc_equation_real_root(a,b,c);
}
else
{
calc_equation_vir_root(a,b,c);
}
}
else
{
printf("Input the a value not equel zero!\n");
}
}
equation.h
#ifndef _EQUATION_H
#define _EQUATION_H
extern double calc_equation_delt(double a,double b,double c);
extern void calc_equation_real_root(double a,double b,double c);
extern void calc_equation_vir_root(double a,double b,double c);
extern void equation_output(double a,double b,double c);
extern void run_equation(void);
#endifmain.c
#include "menu.h"
void main()
{
run_menu();
}menu.c
#include
#include
#include "circle.h"
#include "display.h"
#include "equation.h"
#include "menu.h"
#include "trape.h"
#include "triangle.h"
void menu(void);
void choice_func(void);
void run_menu(void);
void choice_func(void)
{
int choice;
printf("Pleased input choice(circle,equation,trape,triangle,exit):");
scanf("%d",choice);
switch(choice)
{
case 1:run_circle();break;
case 2:run_equation();break;
case 3:run_trape();break;
case 4:run_triangle();break;
case 0:exit;break;
default:
printf("The invilid input choice!/n");break;
}
}
void menu(void)
{
while(1)
{
system("cls");
run_display();
choice_func();
system("pause");
}
}
void run_menu(void)
{
menu();
} menu.h
#ifndef _MENU_H
#define _MENU_H
extern void choice_func(void);
extern void menu(void);
extern void run_menu(void);
#endiftrape.c
#include
double trape_cacl(double top,double bottom,double higher);
void trape_output(double top,double bottom,double higher);
void run_trape(void);
void main()
{
run_trape();
}
void run_trape(void)
{
double top, bottom, higher;
printf("The triangle top:");
scanf("%lf",&top);
printf("The triangle bottom:");
scanf("%lf",&bottom);
printf("The triangle higher:");
scanf("%lf",&higher);
trape_output(top,bottom,higher);
}
double trape_cacl(double top,double bottom,double higher)
{
return (top+bottom)*higher/2.0;
}
void trape_output(double top,double bottom,double higher)
{
if(top>0 && bottom>0 && higher>0)
{
printf("The trape area:%lf\n",trape_cacl(top,bottom,higher));
}
else
{
printf("pleased input the radius than bigger 0\n");
}
} trape.h
#ifndef _TRAPE_H
#define _TRAPE_H
extern double trape_cacl(double top,double bottom,double higher);
extern void trape_output(double top,double bottom,double higher);
extern void run_trape(void);
#endiftrangle.c
#include
#include
double tri_cacl(double side_1,double side_2,double side_3);
void tri_output(double side_1,double side_2,double side_3);
void run_triangle(void);
void main()
{
run_triangle();
}
void run_triangle(void)
{
double side_1, side_2, side_3;
printf("The triangle side1:");
scanf("%lf",&side_1);
printf("The triangle side2:");
scanf("%lf",&side_2);
printf("The triangle side3:");
scanf("%lf",&side_3);
tri_output(side_1,side_2,side_3);
}
double tri_cacl(double side_1,double side_2,double side_3)
{
double l,tri_area,templet;
l=(side_1 + side_2 + side_3)/2.0;
templet=l*(l-side_1)*(l-side_2)*(l-side_3);
tri_area=sqrt(templet);
return tri_area;
}
void tri_output(double side_1,double side_2,double side_3)
{
if(side_1>0 && side_2>0 && side_3>0)
{
if((side_1 + side_2>side_3)&& (side_1 + side_3>side_2) && (side_2 + side_3>side_1))
{
printf("The triangle area:%lf\n",tri_cacl(side_1, side_2, side_3));
}
else
{
printf("Input the correct value!\n");
}
}
else
{
printf("Input the correct value!\n");
}
}
trangle.h
#ifndef _TRIANGLE_H
#define _TRIANGLE_H
extern double tri_cacl(double side_1,double side_2,double side_3);
extern void tri_output(double side_1,double side_2,double side_3);
extern void run_triangle(void);
#endif