/*
前两天写了一个这样的程序，有很多不足之处。在几位热心朋友的建议与帮助下，新的程序终于诞生了。
它虽然很小，也很简单，但这也是我辛苦的成果。希望诸位能够喜欢。
*/



#include<stdio.h>
#include<stdlib.h>
#include<time.h>
char YN[100]={"您错了。请问您是放弃这道题，还是更改答案？您有一次更改的机会\n"
              "按N退出这道题，按其它键更改。\n"};
char dui[100]={"恭喜您，答对了！\n"};
char caidan[3][100]={{"***********************************************************************\n"},
                     {"您好，欢迎您来玩这个小游戏，它将会验证您的计算能力。 \n"},
                     {"对不起，您输入的字符非法，请重新输入。\n"}};
char jisuanfu[30]={'+','-','*','/','/','/','*','+','+','-','/','*','/','+','-','-','+','*','*','/','/','+','+','-','-','-','*','*','*','*'};

/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~菜单*/
char caidan1()
{
        char x;
        char y[]={"请您用大写字符输入您的选择：\n"};
        char caidan_1[100]={"\t\n\tA：初级\n\tB：中级\n\tC：高级\n\tD：游戏说明\n\tE：退出\n\n\n"};
        system("cls");
        printf("%s\t%s\n\n",caidan[0],caidan[1]);
        printf("%s\n",caidan_1);
        printf("\n%s\n\n\n\t%s ",caidan[0],y);
        do
        {
                 scanf("  %c",&x);
                 if(x<65||x>69)
                         printf("\n\t%s\n\t%s",caidan[2],caidan[0]);
        }
        while(x<65||x>69);
        if(x=='E')
                exit(0);
        if(x=='D')
                shuoming();
        if(x>=65&&x<=67)
        {
                printf("\n祝您好运！    \n\n");
                sleep(2);
                return x;
        }




}
/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~说明*/
shuoming()
{
        char x;
        system("cls");
        printf("\n%s\n\n\n",caidan[0]);
        printf("\t您好，欢迎您来玩这个加、减、乘、除的数学小测试。它分为三个等级：\n"
               "\t初级：  二位数以下的运算，无小数，无负数，可更改一次答案，\n"
               "\t        每题7分，有无错奖20分；\n "
               "\t中级：  二位数以下的运算，结果精确到2位小数，有负数，每题8分，\n"
               "\t        无错奖20分；\n"
               "\t高级：  三位数以下的运算，结果精确到3位小数，有负数，每题20分\n");
       printf("%s\n\n",caidan[0]);
       printf("请问您是要回到主菜单还是要退出？退出按N，其它键回到主菜单:\n\n");
       scanf("  %c",&x);
       if(x=='N'||x=='n')
               exit(0);
       else    caidan1();
}
/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~运算*/
float yunsuan( float a, float b,char jisuanfu)
{
        float c;
        switch(jisuanfu)
        {
                case '+':  c=a+b;  break;
                case '-':  c=a-b;  break;
                case '*':  c=a*b;  break;
                case '/':  c=a/b;
        }
        return   c;
}
/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~初级*/
int chuji()
{
       int a,b,i,zh,x,X,fen=0,jieguo,j=1,k,m=0;
       system("cls");
       printf("\t%s\n",caidan[0]);
       srand(time(NULL));
       i=rand()%20+0;
       for(;j<=10;i++,j++)
       {
               k=0;
               srand(time(NULL));
               a=rand()%99+5;
               srand(time(NULL)+1);
               b=rand()%99+5;
               if(a<b)
               {
                       zh=a;
                       a=b;
                       b=zh;
               }
               while(a%b!=0)
               {
                       a++;
               }
               printf("\n第%d题：%d %c %d = ",j,a,jisuanfu[i],b);
               x=yunsuan(a,b,jisuanfu[i]);   /*~~~~~~~~此处不加int是否能转换过来？*/
               while(k==0)
               {
                       scanf("  %d",&jieguo);
                       puts(" ");
                       if(x==jieguo)
                               printf("%s\n您的分数为%d。\n%s \n\n\n",dui,fen+=7,caidan[0]);
                       else
                       {
                               m++;
                               printf("%s\n%s\n\n",YN,caidan[0]);
                               scanf("  %c",&X);
                               if(X=='N'||X=='n')
                                       break;
                               else
                               {
                                        printf("%d %c %d = ",a,jisuanfu[i],b);
                                        scanf("  %d",&jieguo);
                                        if(x==jieguo)
                                        {
                                                 printf("\n%s\n您的分数为：%d\n%s\n\n",dui,fen+=7,caidan[0]);
                                                 break;
                                        }
                               }
                               printf("非常遗憾，您错了！不加分。\n");
                       }
                       k++;
               }
       }
       if(m==0)
       {
               printf("您无一题出过错，奖励10分。\n");
               fen+=20;
       }
       printf("任意键继续:");
       getch();
       return fen;
}
/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~中级*/
int zhongji()
{
       int i,X,fen=0,j=1,k=0;
       float a,b,x,zh,jieguo;
       system("cls");
       printf("%s\n",caidan[0]);
       srand(time(NULL));
       i=rand()%20+0;
       for(;j<=10;i++,j++)
       {
               srand(time(NULL));
               a=rand()%99+1;
               srand(time(NULL)+1);
               b=rand()%99+1;
               printf("\n第%d题：%f %c %f = ",j,a,jisuanfu[i],b);
               scanf("  %f",&jieguo);
               puts(" ");
               x=yunsuan(a,b,jisuanfu[i]);
               if(x<jieguo)
               {
                       zh=x;
                       x=jieguo;
                       jieguo=zh;
               }
               if(x-jieguo<=0.009)
                       printf("%s\n您的分数为：%d\n\n%s\n\n",dui,fen+=8,caidan[0]);
               else
               {
                       k++;
                       printf("\n非常遗憾，您错了！\n%s\n\n",caidan[0]);
               }
       }
       if(k==0)
       {
               printf("您无一题出错，奖20分。\n\n");
               fen+=20;
       }
       printf("请按任意键:\n");

       return fen;
}
/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~高级*/
int gaoji()
{
       int i,fen=0,j=1;
       float jieguo,zh,a,b,x;
       system("cls");
       printf("%s\n",caidan[0]);
       srand(time(NULL));
       i=rand()%20+0;
       for(;j<=10;i++,j++)
       {
               srand(time(NULL));
               a=rand()%999+1;
               srand(time(NULL)+1);
               b=rand()%999+1;
               a=a/0.03;
               b=b/0.03;
               printf("\n第%d题：%f %c %f = ",j,a,jisuanfu[i],b);
               scanf("  %f",&jieguo);
               puts(" ");
               x=yunsuan(a,b,jisuanfu[i]);
               if(x<jieguo)
               {
                      zh=x;
                      x=jieguo;
                      jieguo=zh;
               }
               if(x-jieguo<=0.0009)
               {
                       printf("%s\n%s\n\n",dui,caidan[0]);
                       fen+=10;
               }
               else
               {
                       printf("\n非常遗憾，您错了！\n");
                       printf("\n%s\n\n",caidan[0]);
               }
       }
       return fen;
}
/*########################################################主函数*/
int main(void)
{
        int fen;
        char x;
        while(1)
        {
                x=caidan1();
                switch(x)
                {
                        case 'A': fen=chuji();
                                  break;
                        case 'B': fen=zhongji();
                                  break;
                        case 'C': fen=gaoji();
                }
                printf("在您这轮测试中，您得了%d分。\n",fen);
                printf("请按任意键：\n");
                getch();

         }
}

您好，欢迎您来找错，您的找错就是我前进的动力，是对我最大的支持与关爱。

：）

    您的意见，我仔细看了一下，对您的态度我很感动，您不是简单地回复一些“顶”之类的“条件反射”的话语，而是认真对我的程序进行了测试。非常感谢。

    对您的意见，第一、二、三条，我基本凭自己现在的能力可以改正。第四、五、六条，我应该学过这些知识，只不过没有应用到，您能不能提示一下，或者给个关键词什么的？

    呵呵，辛苦辛苦，劳烦您再打几个字。我这不是作业，请不必怀有抵触心理。

    再次欢迎您来找错。

/*
针对大家提出的意见，已经作出了如下调整：
1：改进了选择的时候只可以输入大写（当初有些懒，在此检讨）；
2：输入错误重新输入的时候，又返回到菜单界面；
3：中级已经改进显示形式，强制转换为int型；
4：初级的结果输入改为float 型，另外在每级的输入结束都加上while((c=getchar())!='\n'&&c!=EOF);这样的字符，
   改正了出现的错误情况；
5：输入结果改为double型；
6：其它键输入改为getchar();。

    特别感谢nobush 与qfyzy朋友的意见与建议，对于hoodlum1980朋友提出的意见，我现在还没想到太好的办法来改进。比如说，我试过：int a;
                    float b;
                    a=b*100;
                    b=a/100;
                    这样类似的形式，但也许是我的算法有误，或者是其它原因，没有成功，如果您有好的算法，请告知,谢谢。


       非常感谢大家对我的帮助，特别感谢。也谢谢老帖子的各位朋友的建议与意见。

*/



#include<stdio.h>
#include<stdlib.h>
#include<time.h>
char YN[100]={"您错了。请问您是放弃这道题，还是更改答案？您有一次更改的机会\n"
              "按N退出这道题，按其它键更改。\n"};
char dui[100]={"恭喜您，答对了！\n"};
char caidan[3][100]={{"***********************************************************************\n"},
                     {"您好，欢迎您来玩这个小游戏，它将会验证您的计算能力。 \n"},
                     {"对不起，您输入的字符非法，请重新输入。\n"}};
char jisuanfu[30]={'+','-','*','/','/','/','*','+','+','-','/','*','/','+','-','-','+','*','*','/','/','+','+','-','-','-','*','*','*','*'};

/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~菜单*/
char caidan1()
{
        char x;
        char y[]={"请您输入您的选择：\n"};
        char caidan_1[100]={"\t\n\tA：初级\n\tB：中级\n\tC：高级\n\tD：游戏说明\n\tE：退出\n\n\n"};
        do
        {
                 system("cls");
                 printf("\n%s\t%s\n\n",caidan[0],caidan[1]);
                 printf("%s\n",caidan_1);
                 printf("\n%s\n\n\n\t%s ",caidan[0],y);
                 x=getchar();
                /* while((x=getchar())!='\n'&&x!=EOF); */
                 if(x!='a'&&x!='A'&&x!='b'&&x!='B'&&x!='c'&&x!='C'&&x!='d'&&x!='D'&&x!='e'&&x!='E')
                 {
                         printf("\n\t%s\n%s",caidan[2],caidan[0]);
                         sleep(1);
                 }
        }
        while(x!='a'&&x!='A'&&x!='b'&&x!='B'&&x!='c'&&x!='C'&&x!='d'&&x!='D'&&x!='e'&&x!='E');
        if(x=='E'||x=='e')
                exit(0);
        if(x=='D'||x=='d')
                shuoming();
        if(x=='a'||x=='A'||x=='b'||x=='B'||x=='c'||x=='C')
        {
                printf("\n祝您好运！    \n\n");
                sleep(2);
                if(x=='a'||x=='A')
                        x='A';
                else if(x=='b'||x=='B')
                        x='B';
                else  x='C';
                return x;
        }




}
/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~说明*/
shuoming()
{
        char x;
        system("cls");
        printf("\n%s\n\n\n",caidan[0]);
        printf("\t您好，欢迎您来玩这个加、减、乘、除的数学小测试。它分为三个等级：\n"
               "\t初级：  二位数以下的运算，无小数，无负数，可更改一次答案，\n"
               "\t        每题7分，有无错奖20分；\n "
               "\t中级：  二位数以下的运算，结果精确到2位小数，有负数，每题8分，\n"
               "\t        无错奖20分；\n"
               "\t高级：  三位数以下的运算，结果精确到3位小数，有负数，每题20分\n");
       printf("%s\n\n",caidan[0]);
       printf("请问您是要回到主菜单还是要退出？退出按N，其它键回到主菜单:\n\n");
       x=getchar();;
       if(x=='N'||x=='n')
               exit(0);
       else    caidan1();
}
/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~运算*/
float yunsuan( float a, float b,char jisuanfu)
{
        float c;
        switch(jisuanfu)
        {
                case '+':  c=a+b;  break;
                case '-':  c=a-b;  break;
                case '*':  c=a*b;  break;
                case '/':  c=a/b;
        }
        return   c;
}
/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~初级*/
int chuji()
{
       int a,b,c,i,zh,x,X,fen=0,j=1,k,m=0;
       float jieguo;
       system("cls");
       printf("\t%s\n",caidan[0]);
       srand(time(NULL));
       i=rand()%20+0;
       for(;j<=10;i++,j++)
       {
               k=0;
               srand(time(NULL));
               a=rand()%99+5;
               srand(time(NULL)+1);
               b=rand()%99+5;
               if(a<b)
               {
                       zh=a;
                       a=b;
                       b=zh;
               }
               while(a%b!=0)
               {
                       a++;
               }
               printf("\n第%d题：%d %c %d = ",j,a,jisuanfu[i],b);
               x=yunsuan(a,b,jisuanfu[i]);
               while(k==0)
               {
                       scanf("  %f",&jieguo);
                       puts(" ");
                       while((c=getchar())!='\n'&&c!=EOF);
                       if(x==jieguo)
                               printf("%s\n您的分数为%d。\n%s \n\n\n",dui,fen+=7,caidan[0]);
                       else
                       {
                               m++;
                               printf("%s\n%s\n\n",YN,caidan[0]);
                               while((X=getchar())!='\n'&&X!=EOF);
                               if(X=='N'||X=='n')
                                       break;
                               else
                               {
                                        printf("\n\n%d %c %d = ",a,jisuanfu[i],b);
                                        scanf("  %f",&jieguo);
                                        puts(" ");
                                        while((c=getchar())!='\n'&&c!=EOF);
                                        if(x==jieguo)
                                        {
                                                 printf("\n%s\n您的分数为：%d\n%s\n\n",dui,fen+=7,caidan[0]);
                                                 break;
                                        }
                               }
                               printf("非常遗憾，您错了！不加分。\n%s\n\n",caidan[0]);
                       }
                       k++;
               }
       }
       if(m==0)
       {
               printf("您无一题出过错，奖励10分。\n");
               fen+=20;
       }
       printf("任意键继续:");
       getch();
       return fen;
}
/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~中级*/
int zhongji()
{
       int i,X,fen=0,j=1,k=0,c;
       float a,b,x,zh,jieguo;
       system("cls");
       printf("%s\n",caidan[0]);
       srand(time(NULL));
       i=rand()%20+0;
       for(;j<=10;i++,j++)
       {
               srand(time(NULL));
               a=rand()%99+1;
               srand(time(NULL)+1);
               b=rand()%99+1;
               printf("\n第%d题：%d %c %d = ",j,(int)a,jisuanfu[i],(int)b);
               scanf("  %f",&jieguo);
               while((c=getchar())!='\n'&&c!=EOF);
               puts(" ");
               x=yunsuan(a,b,jisuanfu[i]);
               if(x<jieguo)
               {
                       zh=x;
                       x=jieguo;
                       jieguo=zh;
               }
               if(x-jieguo<=0.009)
                       printf("%s\n您的分数为：%d\n\n%s\n\n",dui,fen+=8,caidan[0]);
               else
               {
                       k++;
                       printf("\n非常遗憾，您错了！\n%s\n\n",caidan[0]);
               }
       }
       if(k==0)
       {
               printf("您无一题出错，奖20分。\n\n");
               fen+=20;
       }
       printf("请按任意键:\n");
       getch();

       return fen;
}
/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~高级*/
int gaoji()
{
       int i,fen=0,j=1,c;
       float zh,a,b,x;
       double jieguo;
       system("cls");
       printf("%s\n",caidan[0]);
       srand(time(NULL));
       i=rand()%20+0;
       for(;j<=10;i++,j++)
       {
               srand(time(NULL));
               a=rand()%999+1;
               srand(time(NULL)+1);
               b=rand()%999+1;
               a=a/0.3;
               b=b/0.3;
               printf("\n第%d题：%f %c %f = ",j,a,jisuanfu[i],b);
               scanf("  %lf",&jieguo);
               while((c=getchar())!='\n'&&c!=EOF);
               puts(" ");
               x=yunsuan(a,b,jisuanfu[i]);
               if(x<jieguo)
               {
                      zh=x;
                      x=jieguo;
                      jieguo=zh;
               }
               if(x-jieguo<=0.0009)
               {
                       printf("%s\n%s\n\n",dui,caidan[0]);
                       fen+=10;
               }
               else
               {
                       printf("\n非常遗憾，您错了！\n");
                       printf("\n%s\n\n",caidan[0]);
               }
       }
       return fen;
}
/*########################################################主函数*/
int main(void)
{
        int fen;
        char x;
        while(1)
        {
                x=caidan1();
                switch(x)
                {
                        case 'A': fen=chuji();
                                  break;
                        case 'B': fen=zhongji();
                                  break;
                        case 'C': fen=gaoji();
                }
                printf("在您这轮测试中，您得了%d分。\n",fen);
                printf("请按任意键：\n");
                getch();

         }
}