C语言程序设计：小学生测验

#include<stdlib.h>

#include<stdio.h>

#include<conio.h>

void main()

{

int num=0,err=0/* 答题数，错误数 */

while(1)

{

int a=0,b=0,d=0,c=0,i=0,result

char sf[2]={'+','-'}

/* 出题 */

while(1)

{

a=rand()%51

b=rand()%51

d=rand()%2

if(d==0)c=a+b

else c=a-b

if(c>=0 &&c<=50)break

}

printf("%d %c %d = \n",a,sf[d],b)

/* 回答 */

printf("输入计算结果:\n")

while(1)

{

scanf("%d",&result)

i++

if(result==c)

{

printf("回答正确!\n")

break

}

else if(i<3)

{

printf("错误,请重新回答:\n")

}

else

{

err++

break

}

}

num++

if(num==10)break

}

printf("\n得分:%d 正确率:%d%\n",100-err*10,100-err*10)

getch()

}

参考实例源码如下：

//#include <stdlib.h>

#include <iostream>

using namespace std

int main()

{

int i,j,k,l=0,n

cout<<"小学数学测试"<<endl

cout<<"请选择想测试的题型:1.+ 2.- 3.* 4./:"

cin>>i

if(i==1)

{

cout<<"请输入测试题的个数："

cin>>j

for(int k1=0k1<jk1++)

{

srand((unsigned)time(NULL))

int x1=rand()%100

int x2=rand()%100

cout<<x1<<"+"<<x2<<"=:"

cin>>k

if(k==x1+x2){

cout<<"回答正确！"<<endl

l++

}

else

cout<<"回答错误！正确答案为："<<x1+x2<<endl

}

}

else if(i==2)

{

cout<<"请输入测试题的个数："

cin>>j

for(int k1=0k1<jk1++)

{

srand((unsigned)time(NULL))

int x1=rand()%100

int x2=x1+rand()%50

cout<<x2<<"-"<<x1<<"=:"

cin>>k

if(k==x2-x1){

cout<<"回答正确！"<<endl

l++

}

else

cout<<"回答错误！正确答案为："<<x2-x1<<endl

}

}

else if(i==3)

{

cout<<"请输入测试题的个数："

cin>>j

for(int k1=0k1<jk1++)

{

srand((unsigned)time(NULL))

int x1=rand()%100

int x2=rand()%100

cout<<x1<<"*"<<x2<<"=:"

cin>>k

if(k==x1*x2){

cout<<"回答正确！"<<endl

l++

}

else

cout<<"回答错误！正确答案为："<<x1*x2<<endl

}

}

else if(i==4)

{

cout<<"请输入测试题的个数："

cin>>j

for(int k1=0k1<jk1++)

{

srand((unsigned)time(NULL))

int x1=rand()%100+1

int x2=x1*(rand()%10)

cout<<x2<<"/"<<x1<<"=:"

cin>>k

if(k==x2/x1){

cout<<"回答正确！"<<endl

l++

}

else

cout<<"回答错误！正确答案为："<<x2/x1<<endl

}

}

cout<<"这次测试你作对的题目的个数为"<<l<<"个"<<endl

cout<<"是否继续测试：0.退出 1.继续:"

cin>>n

if(n==1){

return main()}

//system("PAUSE")

return 0

}

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