计算机辅导教学(CAI)软件开发：教小学生学算术

1、#include<stdio.h>#include<string.h>#include <stdlib.h>#include <math.h>#include <time.h>void cd(); /菜单void gz(); /游戏规则函数void add(); /个位数加法void add1(); /十位数加法void sub(); /个位数减法void sub1(); /十位数减法void mul(); /个位数乘法void mul1(); /十位数乘法void div(); /个位数除法void div1(); /十位数除法vo

2、id tc(); /退出函数int sum=0,k;main()cd();return 0;void cd() /菜单int z;printf(" n"); printf(" 菜单 n");printf(" 0.规则 n");printf(" 1.加法 n");printf(" 2.减法 n");printf(" 3.乘法 n");printf(" 4.除法 n");printf(" n"); printf(" 请选择 n&q

3、uot;); scanf("%d",&z);if(z>9|z<0)printf("输入错误！请重新输入！n"); scanf("%d",&z);switch(z)case 0: gz(); break ;case 1: add(); break ;case 2: sub(); break ;case 3: mul(); break ;case 4: div(); break ;default:tc();void gz() /游戏规则函数int l;printf(" n"); printf

4、(" 游戏规则 n");printf(" 1、你可以选择加法，减法，乘法，除法，运算四种运算。 n"); printf(" 2、每种运算分为两个等级，第一级和第二级 n"); printf(" 3、第一级为个位数运算，第二级为十位数运算。 n"); printf(" 4、做第一级正确率达到90%，将进入第二级。 n"); printf(" 5、若在第二级的正确率低于60%将会降级。 n"); printf(" n"); printf(" 输入（0

5、）返回菜单n");scanf("%d",&l);if(l>=9|l<0)printf("输入错误！请重新输入！n");printf(" 是否继续挑战？n");printf("Yes(0)继续挑战，No(1)结束!n");scanf("%d",&l);switch(l)case 0: cd(); break ;default:tc();void add() /个位数加法int x,y,i,j;float answer;int sum=0; /统计一次答对的题数

6、sumprintf("请输入挑战的题量："); /输入的题目数量kscanf("%d",&k);for( i=1 ; i<=k ; i+)srand (unsigned)time(0); /用当前时间作参数，计算随机数种子 x=(rand()%10); /取09之间的随机数y=(rand()%10);printf("%d+%d=",x,y);scanf("%f",&answer);if(answer!=(x+y)j=1;while(answer!=(x+y)&&j<3)p

7、rintf("答案错误，请输入正确答案：n"); printf("%d+%d=",x,y);scanf("%f",&answer);j+;if(j>=3)printf("正确答案：n");printf("%fn",answer=(float)x+(float)y); elseprintf("回答正确！n");elsesum+;printf("回答正确！n");printf("答对题数：%d 答错题数为：%5.2f%n",s

8、um,(k-sum),(sum/(float)k*100); if(sum/(float)k)>=0.9)printf("恭喜您晋级了！n");add1();elseprintf("抱歉您未能晋级n");tc();void add1() /十位数加法int x,y,i,k,j,sum=0 ; %d 一次答对率：float answer;printf("请输入挑战的题量：");scanf("%d",&k);for( i=1 ; i<=k ; i+)srand (unsigned)time(0);x

9、=(rand()%90+10);y=(rand()%90+10);printf("%d+%d=",x,y);scanf("%f",&answer);if(answer!=(x+y)j=1;while(answer!=(x+y)&&j<3)printf("答案错误，请输入正确答案：n"); printf("%d+%d=",x,y);scanf("%f",&answer);j+;if(j>=3)printf("正确答案：n");prin

10、tf("%fn",answer=(float)x+(float)y); elseprintf("回答正确！n");elsesum+;printf("回答正确！n");printf("答对题数：%d 答错题数：为：%5.2f%n",sum,(k-sum),(sum/(float)k*100);if(sum/(float)k)<0.6)printf("很抱歉，您降级了！回到第一级！n"); add();else %d 一次答对率printf("恭喜您，顺利通关！n");tc

11、();void sub() /个位数减法int x , y , i , k , j , sum=0 ;float answer ;printf("请输入挑战的题量：");scanf("%d",&k);for( i=1 ; i<=k ; i+)srand (unsigned)time(0);loop: /配合goto转跳x=(rand()%10);y=(rand()%10);if(x>=y)printf("%d-%d=",x,y);scanf("%f",&answer);if(answer

12、!=(x-y)j=1;while(answer!=(x-y)&&j<3)printf("答案错误，请输入正确答案：n"); printf("%d-%d=",x,y);scanf("%f",&answer);j+;if(j>=3)printf("正确答案：n");printf("%fn",answer=(float)x-(float)y); elseprintf("回答正确！n");elsesum+;printf("回答正确！n&q

13、uot;);elsegoto loop ;printf("答对题数：%d 答错题数：%d 为：%5.2f%n",sum,(k-sum),(sum/(float)k*100);if(sum/(float)k)>=0.9)printf("恭喜您晋级了！n");sub1();elseprintf("抱歉您未能晋级！n");tc();void sub1() /十位数减法int x , y , i , k , j ,sum=0 ;float answer ;printf("请输入挑战的题量：");scanf("

14、;%d",&k);for( i=1 ; i<=k ; i+)srand (unsigned)time(0);loop:x=(rand()%90+10);y=(rand()%90+10);if(x>=y)printf("%d-%d=",x,y);scanf("%f",&answer);if(answer!=(x-y)j=1;while(answer!=(x-y)&&j<3) 一次答对率printf("答案错误，请输入正确答案：n"); printf("%d-%d=&q

15、uot;,x,y);scanf("%f",&answer);j+;if(j>=3)printf("正确答案：n");printf("%fn",answer=(float)x-(float)y); elseprintf("回答正确！n");elsesum+;printf("回答正确！n");elsegoto loop ;printf("答对题数：%d 答错题数：为：%5.2f%n",sum,(k-sum),(sum/(float)k*100);if(sum/(fl

16、oat)k)<0.6)printf("很抱歉，您降级了！回到第一级！n"); sub();elseprintf("恭喜您，顺利通关！n");tc();void mul() /个位数乘法int x , y , k , i , j , sum=0 ;float answer ;printf("请输入挑战的题量：");scanf("%d",&k); %d 一次答对率for( i=1 ; i<=k ; i+)srand (unsigned)time(0);x=(rand()%10);y=(rand()%

17、10);printf("%d*%d=",x,y);scanf("%f",&answer);if(answer!=(x*y)j=1;while(answer!=(x*y)&&j<3)printf("答案错误，请输入正确答案：n"); printf("%d*%d=",x,y);scanf("%f",&answer);j+;if(j>=3)printf("正确答案：n");printf("%fn",answer=(fl

18、oat)x*(float)y); elseprintf("回答正确！n");elsesum+;printf("回答正确！n");printf("答对题数：%d 答错题数：为：%5.2f%n",sum,(k-sum),(sum/(float)k*100);if(sum/(float)k)>=0.9)printf("恭喜您晋级了！n");mul1();elseprintf("抱歉您未能晋级！");tc(); %d 一次答对率void mul1() /十位数乘法int x , y , i , k

19、 , j ,sum=0 ;float answer ;printf("请输入挑战的题量：");scanf("%d",&k);for( i=1 ; i<=k ; i+)srand (unsigned)time(0);x=(rand()%90+10);y=(rand()%90+10);printf("%d*%d=",x,y);scanf("%f",&answer);if(answer!=(x*y)j=1;while(answer!=(x*y)&&j<3)printf(&quo

20、t;答案错误，请输入正确答案：n"); printf("%d*%d=",x,y);scanf("%f",&answer);j+;if(j>=3)printf("正确答案：n");printf("%fn",answer=(float)x*(float)y); elseprintf("回答正确！n");elsesum+;printf("回答正确！n");printf("答对题数：%d 答错题数：为：%5.2f%n",sum,(k-sum

21、),(sum/(float)k*100);if(sum/(float)k)<0.6) %d 一次答对率printf("很抱歉，您降级了！回到第一级！n"); mul();elseprintf("恭喜您，顺利通关！n");tc();void div() /个位数除法int x , y , i , k , j ;int answer ;int sum=0 ;printf("请输入挑战的题量：");scanf("%d",&k);for( i=1 ; i<=k ; i+)srand (unsigned)

22、time(0);dox=(rand()%10);y=(rand()%10);while(y=0|x%y!=0);printf("%d/%d=",x,y);scanf("%d",&answer);if(answer!=(x/y)j=1;while(answer!=(x/y)&&j<3)printf("答案错误，请输入正确答案：n"); printf("%d/%d=",x,y);scanf("%f",&answer);j+;if(j>=3)printf(&

23、quot;正确答案：n");printf("%fn",answer=(x/y);elseprintf("回答正确！n"); elsesum+;printf("回答正确！n");printf("答对题数：%d 答错为：%5.2f%n",sum,(k-sum),(sum/(float)k*100); if(sum/(float)k)>=0.9)printf("恭喜您晋级了！n");div1();elseprintf("抱歉您未能晋级！");tc();void di

24、v1() /十位数除法int x , y , i , k , j , sum=0 ;int answer ;printf("请输入挑战的题量：");scanf("%d",&k);for( i=1 ; i<=k ; i+)srand (unsigned)time(0);dox=(rand()%90+10);y=(rand()%90+10);while(y=0|x%y!=0);printf("%d/%d=",x,y);scanf("%d",&answer);if(answer!=(x/y)j=1;while(answer!=(x/y)&&j<3) 题数：%d 一次答