#include <stdio.h> #include <stdlib.h> #include <math.h> #include <windows.h> #define pi 3.14159 double volum3(double s,double h) {return 1.0/3*s*h; } double area2(double a,double b) { double s1,s2; s1=2.0*pi*a*b; s2=pi*a*a; return s1+s2; } double area1 (double a,double b) {double s1,s2; s1=pi*a*sqrt(a*a+b*b); s2=pi*a*a; return s1+s2; } double volume1 (double a,double b) {double v; v=pi*a*a*b*1.0/3; return v; } main() {int t,p,i=0; double s1,s2,s3,v1,v2,v3,r1,h1,r2,h2,h3; loop2: printf(" please press the code(two thousands and nine):"); scanf("%d",&p); if(p==2009) { getchar(); system("CLS"); for(i=0;i <1;i++) printf("\n"); printf("\n"); printf("\n"); printf("\n"); printf(" welcome to you\n\n"); Sleep(3000); system("cls"); loop: printf(" ==================================\n"); printf(" |1.the Calculation of cones |\n"); printf(" ==================================\n"); printf(" |2.the Calculation of cylinders|\n"); printf(" ==================================\n"); printf(" |3.the Calculation of pyramids|\n"); printf(" ==================================\n"); printf(" |0. exit the program |\n"); printf(" ==================================\n"); scanf("%d",&t);system("cls"); switch(t) {case 1:printf("please output of the bottom radius of cone\n"); scanf("%lf",&r1); if(r1 <=0) {printf("error");goto loop;} printf("please output of the high of cone\n"); scanf("%lf",&h1); if(h1 <=0) {printf("error");goto loop;} v1=volume1 (r1,h1); s1=area1(r1,h1); printf("the volum is %f\n the area is%f\n",v1,s1); break; case 2:printf("please output of the bottom radius of the cylinder\n"); scanf("%lf",&r2); if(r2 <=0) {printf("error");goto loop;} printf("please output of the high of cylinder\n"); scanf("%lf",&h2); if(h2 <=0) {printf("error");goto loop;} v2=3*volume1(r2,h2); s2=area2(r2,h2); printf("the volum is %lf\n the area is%lf\n",v2,s2);break; case 3:printf("please output the footprint of pyramid\n"); scanf("%lf",&s3); printf("please output of the high of pyramid\n"); scanf("%lf",&h3); if(s3 <=0) {printf("error");goto loop;} v3=volum3(s3,h3); printf("the volum is %lf\n ",v3);break; case 0: for(i=0;i <1;i++) printf("\n"