//1年前学C的时候写的，哈哈，今天派上用场了，找了我好久。

//系统出题是基本的加减乘除。用了随机函数。

#include

#include

#include

int x,y,z,b;char ch;

void jiafa();

void jianfa();

void chengfa();

void chufa();

void main()

{

int o;

printf("\n\t\t小学生计算提高工具\n");

printf("\n\t1.加法  2.减法  3.乘法  4.除法  5.结束");

printf("\n");

printf("\n选择难度：");

scanf("%d",&o);

switch(o)

{

case 1:jiafa();break;

case 2:jianfa();break;

case 3:chengfa();break;

case 4:chufa();break;

case 5:exit(0);break;

default:printf("输入错误!");

}

}

void jiafa()

{ do{

printf("\n\t加法题目：");

srand( (unsigned)time( NULL ) );

x=(rand()%10);

y=(rand()%10);

z=x+y;

printf("%d+%d=",x,y);

scanf("%d",&b);

if(b==z)

{

printf("\n\t答案：");printf("%d+%d=%d\n",x,y,z);printf("\n\t恭喜,答对了!\n\t\t\t\n");

}

else

{

printf("\n\t继续努力!\n\t\t\t\n");

}getchar();

printf("是否继续(Y OR N)");

scanf("%c",&ch);

}while(ch=='y'||ch=='Y');

}

void jianfa()

{

do{

printf("\n\t减法题目：");

srand( (unsigned)time( NULL ) );

x=(rand()%10);

y=(rand()%10);

z=x-y;

printf("%d-%d=",x,y);

scanf("%d",&b);

if(b==z)

{

printf("\n\t答案：");printf("%d-%d=%d\n",x,y,z);printf("\n\t恭喜,答对了!\n\t\t\t\n");

}

else

{

printf("\n\t继续努力!\n\t\t\t\n");

}getchar();

printf("是否继续(Y OR N)");

scanf("%c",&ch);

}while(ch=='y'||ch=='Y');

}

void chengfa()

{

do{

printf("\n\t乘法题目：");

srand( (unsigned)time( NULL ) );

x=(rand()%10);

y=(rand()%10);

z=x*y;

printf("%d*%d=",x,y);

scanf("%d",&b);

if(b==z)

{

printf("\n\t答案：");printf("%d*%d=%d\n",x,y,z);printf("\n\t恭喜,答对了!\n\t\t\t\n");

}

else

{

printf("\n\t继续努力!\n\t\t\t\n");

}getchar();

printf("是否继续(Y OR N)");

scanf("%c",&ch);

}while(ch=='y'||ch=='Y');

}

void chufa()

{

do{

printf("\n\t除法题目：");

srand( (unsigned)time( NULL ) );

x=(rand()%10);

y=(rand()%10);

z=x/y;

printf("%d/%d=",x,y);

scanf("%d",&b);

if(b==z)

{

printf("\n\t答案：");printf("%d/%d=%d\n",x,y,z);printf("\n\t恭喜,答对了!\n\t\t\t\n");

}

else

{

printf("\n\t继续努力!\n\t\t\t\n");

}getchar();

printf("是否继续(Y OR N)");

scanf("%c",&ch);

}while(ch=='y'||ch=='Y');

}