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1.cpp
80 lines (77 loc) · 1.87 KB
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1.cpp
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#include <stdio.h>
#include <stdlib.h>
#include <time.h>
int main()
{
int x,y,z,t; //定义两个操作数x,y,结果z,输入结果t
char k; //运算符k可取“+、-、×、÷”
int i,sum=0; //题目数量i,答对数目sum
srand(time(0));
printf("小学100以内四则运算练习题!!\n");
for(i=0;i<10;i++)
{
x=rand()%100+1;
y=rand()%100+1;
k=rand()%4; //0表加,1表减,2表乘,3表除
/**< 数据合格判断及算式显示 */
printf("第%d题:",i+1);
switch(k)
{
case 0:
while((z=x+y)>100) //保证和在100内
{
x=rand()%100+1;
y=rand()%100+1;
}
printf("%d + %d = ",x,y);
break;
case 1:
if(x<y) //被减数大于减数
{
z=x;
x=y;
y=z;
}
z=x-y;
printf("%d - %d = ",x,y);
break;
case 2:
while((z=x*y)>100) //保证积小于100
{
x=rand()%100+1;
y=rand()%100+1;
}
printf("%d × %d = ",x,y);
break;
case 3:
if(x<y) //被除数必须大于除数
{
z=x;
x=y;
y=z;
}
x=(x/y)*y; //保证整除
z=x/y;
printf("%d ÷ %d = ",x,y);
break;
}
/**< 输入你的计算结果 */
scanf("%d",&t);
if(z==t)
{
sum++;
printf("正确\n");
}
else
printf("错误\n");
}
/**< 输出答对题数和得分 */
printf("答对 %d 题,得分:%d\n",sum,sum*10);
if(sum<=6)
printf("错误较多,请继续努力!\n");
else if(sum<=9)
printf("加油,你会做得更好!\n");
else
printf("你真棒!!!") ;
return 0;
}