C语言界面程序结构

1、#include "stdio.h"#include "stdlib.h"#define PAI 3.14#include "stdio.h"void jiemian();void area() ;void zhou() ;double fact();void djx();main()int item;jiemian();while (1) printf("please select a item:");scanf("%d",&item);switch (item) case 1: ar

2、ea() ; break;case 2: zhou() ; break;case 3: djx() ; break;case 5: fact(); break;case 8: system("cls"); break;case 9: jiemian(); break;case 0: goto loop;default: printf("n input error!nn"); loop: ;void jiemian() /* zhi zuo jie mian! */int item;printf("tt*This is a main progra

3、m!*nnnn");printf("ttt* 1.area *n");printf("ttt* 2.zhouchang *n");printf("ttt* 3.djx *n");printf("ttt* 4.fun2 *n");printf("ttt* 5.fact *n");printf("ttt* 6.fun4 *n");printf("ttt* 7.fun5 *n");printf("ttt* 8.qing ping *n&quo

4、t;);printf("ttt* 9.zhu jie mian *n");printf("ttt* 10.rrrrt *n");printf("ttt* 0.EXIT *nnnn");printf("tt*This is a main program!*nnnn");void area() /* jisuan yuan de mian ji ! */char m;int r;float area;printf("Please input r:");scanf("%d",&am

5、p;r);area=PAI*r*r;printf("area is:%fnn",area); void zhou() /* jisuan yuan de zhou chang ! */int r;float D;printf("Please input r:");scanf("%d",&r);D=3.14*2*r;printf("D is:%fnn",D); double fact() int n; printf("n input n: "); scanf("%d",&n); if(n=0|n=1) return(1); else return(n*fact(n-1); printf("n fact(%d)=%.0lf",n,fact(n); void djx()int a33=11,15,8,47,21,23,12,16,18;int i,j,sum=0;f