c语言圆形体积计算器1) 设计一个菜单函数menu(),显示计算器所有可供选择的功能信息.

enum{FIRST,CALCULATE,SECOND,RESULT};

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int menu(int status,int result=0)

{

switch(status)

{

case FIRST:

{

printf("请输入第一个数");

int x;

scanf("%d",x);

return x;

break;

}

case SECOND:

{

printf("请输入第二个数");

int x;

scanf("%d",x);

return x;

break;

}

case CALCULATE:

{

printf("请输入运算符号");

char x;

scanf("%c",x);

return x;

break;

}

case RESULT:

{

printf("运算结果是%d\n",result);

return 1;

break;

}

}

}

main()

{

int x=0,y=0,status=0,result=0,calculate

x=menu(status);

status++;

while(!(calculate=='+' | calculate=='-' | calculate=='*' | calculate=='/'))

calculate=menu(status);

status++;

y=menu(status);

status++;

switch(calculate)

{

case '+':result=x+y;break;

case '-':result=x-y;break;

case '*':result=x*y;break;

case '/':result=x/y;break;

}

menu(status,result);

}

我想尽快知道这道C语言题的解法

#includestdio.h /*引用库函数*/

#includestdlib.h

#includectype.h

#includestring.h

typedef struct /*定义结构体数组*/

{

char num[10]; /*学号*/

char name[20]; /*姓名*/

int score; /*成绩*/

}Student;

Student stu[80]; /*结构体数组变量*/

int menu_select() /*菜单函数*/

{

char c;

do{

system("cls"); /*运行前清屏*/

printf("\t\t****Students' Grade Management System****\n"); /*菜单选择*/

printf("\t\t | 1. Input Records |\n");

printf("\t\t | 2. Display All Records |\n");

printf("\t\t | 3. Sort |\n");

printf("\t\t | 4. Insert a Record |\n");

printf("\t\t | 5. Delete a Record |\n");

printf("\t\t | 6. Query |\n");

printf("\t\t | 7. Statistic |\n");

printf("\t\t | 8. Add Records from a Text File|\n");

printf("\t\t | 9. Write to a Text file |\n");

printf("\t\t | 0. Quit |\n");

printf("\t\t*****************************************\n");

printf("\t\t\tGive your Choice(0-9):");

c=getchar(); /*读入选择*/

}while(c'0'||c'9');

return(c-'0'); /*返回选择*/

}

int Input(Student stud[],int n) /*输入若干条记录*/

{int i=0;

char sign,x[10]; /*x[10]为清除多余的数据所用*/

while(sign!='n'sign!='N') /*判断*/

{ printf("\t\t\tstudent's num:"); /*交互输入*/

scanf("\t\t\t%s",stud[n+i].num);

printf("\t\t\tstudent's name:");

scanf("\t\t\t%s",stud[n+i].name);

printf("\t\t\tstudent's score:");

scanf("\t\t\t%d",stud[n+i].score);

gets(x); /*清除多余的输入*/

printf("\t\t\tany more records?(Y/N)");

scanf("\t\t\t%c",sign); /*输入判断*/

i++;

}

return(n+i);

}

void Display(Student stud[],int n) /*显示所有记录*/

{

int i;

printf("\t\t\t-----------------------------------\n"); /*格式头*/

printf("\t\t\tnumber name score\n");

printf("\t\t\t-----------------------------------\n");

for(i=1;in+1;i++) /*循环输入*/

{

printf("\t\t\t%-16s%-15s%d\n",stud[i-1].num,stud[i-1].name,stud[i-1].score);

if(i1i%10==0) /*每十个暂停*/

{printf("\t\t\t-----------------------------------\n"); /*格式*/

printf("\t\t\t");

system("pause");

printf("\t\t\t-----------------------------------\n");

}

}

printf("\t\t\t");

system("pause");

}

void Sort_by_num(Student stud[],int n) /*按学号排序*/

{ int i,j,*p,*q,s;

char t[10];

for(i=0;in-1;i++) /*冒泡法排序*/

for(j=0;jn-1-i;j++)

if(strcmp(stud[j].num,stud[j+1].num)0)

{strcpy(t,stud[j+1].num);

strcpy(stud[j+1].num,stud[j].num);

strcpy(stud[j].num,t);

strcpy(t,stud[j+1].name);

strcpy(stud[j+1].name,stud[j].name);

strcpy(stud[j].name,t);

p=stud[j+1].score;

q=stud[j].score;

s=*p;

*p=*q;

*q=s;

}

}

int Insert_a_record(Student stud[],int n) /*插入一条记录*/

{char x[10]; /*清除多余输入所用*/

printf("\t\t\tstudent's num:"); /*交互式输入*/

scanf("\t\t\t%s",stud[n].num);

printf("\t\t\tstudent's name:");

scanf("\t\t\t%s",stud[n].name);

printf("\t\t\tstudent's score:");

scanf("\t\t\t%d",stud[n].score);

gets(x);

n++;

Sort_by_num(stud,n); /*调用排序函数*/

printf("\t\t\tInsert Successed!\n"); /*返回成功信息*/

return(n);

}

int Delete_a_record(Student stud[],int n) /*按姓名查找，删除一条记录*/

{ char s[20];

int i=0,j;

printf("\t\t\ttell me his(her) name:"); /*交互式问寻*/

scanf("%s",s);

while(strcmp(stud[i].name,s)!=0in) i++; /*查找判断*/

if(i==n)

{ printf("\t\t\tnot find!\n"); /*返回失败信息*/

return(n);

}

for(j=i;jn-1;j++) /*删除操作*/

{

strcpy(stud[j].num,stud[j+1].num);

strcpy(stud[j].name,stud[j+1].name);

stud[j].score=stud[j+1].score;

}

printf("\t\t\tDelete Successed!\n"); /*返回成功信息*/

return(n-1);

}

void Query_a_record(Student stud[],int n) /*查找并显示一个记录*/

{ char s[20];

int i=0;

printf("\t\t\tinput his(her) name:"); /*交互式输入*/

scanf("\t\t\t%s",s);

while(strcmp(stud[i].name,s)!=0in) i++; /*查找判断*/

if(i==n)

{ printf("\t\t\tnot find!\n"); /*输入失败信息*/

return;

}

printf("\t\t\this(her) number:%s\n",stud[i].num); /*输出该学生信息*/

printf("\t\t\this(her) score:%d\n",stud[i].score);

}

void Statistic(Student stud[],int n) /*新增功能，输出统计信息*/

{ int i,j=0,k=0,sum=0;

float aver; /*成绩平均值*/

for(i=0;in;i++) /*循环输入判断*/

{

sum+=stud[i].score;

if(stud[j].scorestud[i].score) j=i;

if(stud[k].scorestud[i].score) k=i;

}

aver=1.0*sum/n;

printf("\t\t\tthere are %d records.\n",n); /*总共记录数*/

printf("\t\t\tthe hignest score:\n"); /*最高分*/

printf("\t\t\tnumber:%s name:%s score:%d\n",stud[j].num,stud[j].name,stud[j].score);

printf("\t\t\tthe lowest score:\n"); /*最低分*/

printf("\t\t\tnumber:%s name:%s score:%d\n",stud[k].num,stud[k].name,stud[k].score);

printf("\t\t\tthe average score is %5.2f\n",aver); /*平均分*/

}

int AddfromText(Student stud[],int n) /*从文件中读入数据*/

{ int i=0,num;

FILE *fp; /*定义文件指针*/

char filename[20]; /*定义文件名*/

printf("\t\t\tInput the filename:");

scanf("\t\t\t%s",filename); /*输入文件名*/

if((fp=fopen(filename,"rb"))==NULL) /*打开文件*/

{ printf("\t\t\tcann't open the file\n"); /*打开失败信息*/

printf("\t\t\t");

system("pause");

return(n);

}

fscanf(fp,"%d",num); /*读入总记录量*/

while(inum) /*循环读入数据*/

{

fscanf(fp,"%s%s%d",stud[n+i].num,stud[n+i].name,stud[n+i].score);

i++;

}

n+=num;

fclose(fp); /*关闭文件*/

printf("\t\t\tSuccessed!\n");

printf("\t\t\t");

system("pause");

return(n);

}

void WritetoText(Student stud[],int n) /*将所有记录写入文件*/

{

int i=0;

FILE *fp; /*定义文件指针*/

char filename[20]; /*定义文件名*/

printf("\t\t\tWrite Records to a Text File\n"); /*输入文件名*/

printf("\t\t\tInput the filename:");

scanf("\t\t\t%s",filename);

if((fp=fopen(filename,"w"))==NULL) /*打开文件*/

{

printf("\t\t\tcann't open the file\n");

system("pause");

return;

}

fprintf(fp,"%d\n",n); /*循环写入数据*/

while(in)

{

fprintf(fp,"%-16s%-15s%d\n",stud[i].num,stud[i].name,stud[i].score);

i++;

}

fclose(fp); /*关闭文件*/

printf("Successed!\n"); /*返回成功信息*/

}

void main() /*主函数*/

{

int n=0;

for(;;)

{

switch(menu_select()) /*选择判断*/

{

case 1:

printf("\t\t\tInput Records\n"); /*输入若干条记录*/

n=Input(stu,n);

break;

case 2:

printf("\t\t\tDisplay All Records\n"); /*显示所有记录*/

Display(stu,n);

break;

case 3:

printf("\t\t\tSort\n");

Sort_by_num(stu,n); /*按学号排序*/

printf("\t\t\tSort Suceessed!\n");

printf("\t\t\t");

system("pause");

break;

case 4:

printf("\t\t\tInsert a Record\n");

n=Insert_a_record(stu,n); /*插入一条记录*/

printf("\t\t\t");

system("pause");

break;

case 5:

printf("\t\t\tDelete a Record\n");

n=Delete_a_record(stu,n); /*按姓名查找，删除一条记录*/

printf("\t\t\t");

system("pause");

break;

case 6:

printf("\t\t\tQuery\n");

Query_a_record(stu,n); /*查找并显示一个记录*/

printf("\t\t\t");

system("pause");

break;

case 7:

printf("\t\t\tStatistic\n");

Statistic(stu,n); /*新增功能，输出统计信息*/

printf("\t\t\t");

system("pause");

break;

case 8:

printf("\t\t\tAdd Records from a Text File\n");

n=AddfromText(stu,n); /*新增功能，输出统计信息*/

break;

case 9:

printf("\t\t\tWrite to a Text file\n");

WritetoText(stu,n); /*循环写入数据*/

printf("\t\t\t");

system("pause");

break;

case 0:

printf("\t\t\tHave a Good Luck,Bye-bye!\n"); /*结束程序*/

printf("\t\t\t");

system("pause");

exit(0);

}

}

}

求一个C语言菜单函数的程序？

1、对于窗口组件菜单，需要根据不同平台，通过图形编程接口，进行菜单的编制。

例程：

#includestdio.h 

#includegraphics.h 

#includeconio.h 

void main() 

{ 

char str; 

int i,k,choice=1; 

int gd=DETECT,gm; 

initgraph(gd,gm," "); 

setbkcolor(2); 

settextstyle(3,0,3); 

outtextxy(140,120,"A. The Mock Clock."); 

outtextxy(140,150,"B. The Digital Clock."); 

outtextxy(140,180,"C. Exit."); 

setlinestyle(0,0,3); 

rectangle(170,115,370,145); 

/*按上下键选择所需选项*/ 

for(i=1;i=100;i++) 

{ 

str=getch(); 

if(str==72) 

{ 

--choice; 

if(choice==0)choice=3; 

} 

if(str==80) 

{ 

++choice; 

if(choice==4)choice=1; 

} 

if(str==13)break; ／＊按回车键确认＊／ 

/*画图做菜单*/ 

cleardevice(); 

switch(choice) 

{ case 1: setlinestyle(0,0,3); 

rectangle(170,115,400,145); 

settextstyle(3,0,3); 

outtextxy(140,120,"A. The Mock Clock."); 

settextstyle(3,0,3); 

outtextxy(140,150,"B. The Digital Clock."); 

outtextxy(140,180,"C. Exit."); 

break; 

case 2: setlinestyle(0,0,3); 

rectangle(170,145,400,175); 

settextstyle(3,0,3); 

outtextxy(140,120,"A. The Mock Clock."); 

settextstyle(3,0,3); 

outtextxy(140,150,"B. The Digital Clock."); 

settextstyle(3,0,3); 

outtextxy(140,180,"C. Exit."); 

break; 

case 3: settextstyle(3,0,3); 

outtextxy(140,120,"A. The Mock Clock."); 

outtextxy(140,150,"B. The Digital Clock."); 

settextstyle(3,0,3); 

outtextxy(140,180,"C. Exit."); 

setlinestyle(0,0,3); 

rectangle(170,175,400,205); 

break; 

} 

} 

if(i=100)exit(0);／＊如果按键超过100次退出＊／ 

switch(choice)/*这里引用函数，实现所要的功能*/ 

{ 

case 1: cleardevice(); 

setbkcolor(4); 

settextstyle(3,0,4); 

outtextxy(160,120,"No.1 have not built."); break; 

case 2: cleardevice(); 

setbkcolor(4); 

settextstyle(3,0,4); 

outtextxy(160,150,"No.2 have not built."); 

break; 

case 3: exit(0); 

} 

getch(); 

closegraph(); 

}

2、对于命令行菜单，直接通过不断刷新输出来模拟菜单行为。

例程：

#include stdio.h

#include stdlib.h 

#include string.h

int n,t,k;

int m;

char s1[20],s2[20],c;

char **l;

char *num[]={"one","two","three","four","five","six","seven","eight","nine","ten"};

void menu()

{

printf("\n\n\t\t*******************************************************\n");

printf("\t\t**   1.查找字符串S1中S2出现的次数                    **\n");

printf("\t\t**   2.统计字符串中大小写字母，数字出现的次数        **\n");

printf("\t\t**   3.将数字翻译成英语                              **\n");

printf("\t\t**   4.结束                                          **\n");

printf("\t\t*******************************************************\n");

printf("\t\t     您的输入：");

fflush(stdin);

scanf("%d",n);

}

void check()

{

char a[20],b[20];

int j=0,k,m,l=0;

int t=0,n=0;

printf("请输入主字符串：\n");

scanf("%s",a);

k=strlen(a);

printf("请输入子字符串：\n");

scanf("%s",b);

m=strlen(b);

for(n=0;nk;n++)

if(a[n]==b[0])

{

j++; /*记录相同的字符数*/

do

{    

if(a[++n]==b[++t])

{ 

j++;

if(j==m) 

{

l++;/*子字符串相同数*/

j=0;/*判断后相同字符数归零*/

t=-1;/*判断中if中++t;t将会归零*/

}

}

else

{

j=0;

t=0;

break;/*如果不同跳出while循环让for使n+1继续判断*/

}

}while(a[n]!='\0');/*查找完字符数组a结束*/

}

printf("子字符串出现次数：\n%d\n",l);

}                                  

void cout()

{

int n=0,t=0,k=0;

printf("请输入一个字符串：\n");

fflush(stdin);/*清除缓冲*/

while((c=getchar())!='\n')

{

if(c='a'c='z')

n++;

if(c='A'c='Z')

t++;

if(c='0'c='9')

k++;

}

printf("有大写字母：\n%d\n",t);

printf("有小写字母：\n%d\n",n);

printf("有数字：\n%d\n",k);

}

void number()

{

l=num;

printf("请输入一个数字：(0-10)\n");

fflush(stdin);

scanf("%d",m);

printf("%d对应的英文是：\n%s\n",m,*(l+m-1));

}

void main()

{

while(1)

{   

system("cls");

menu();

switch(n)

{

case 1:system("cls");check();system("pause");break;

case 2:system("cls");cout();system("pause");break;

case 3:system("cls");number();system("pause");break;

case 4:system("cls");break;

default:system("cls");break; 

}

if(n==4) break;

}

printf("感谢使用\n");

}

C语言高手进来啊，小弟有个题要问你们啊，谢谢啦

int menu_select() /*菜单函数*/

这句上面少一个 }

你加上就可以了

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