用C++编写一个8进制的加减乘除运算程序

二进制数的算术运算的基本规律和十进制数的运算十分相似。最常用的是加法运算和乘法运算。

1

二进制加法

有四种情况：

0+0＝0

0+1＝1

1+0＝1

1+1＝0

进位为1

例1103求

(1101)2+(1011)2

的和

解：

1

1

0

1

+

1

0

1

1

1

1

0

0

2

二进制乘法

有四种情况：

0×0＝0

1×0＝0

0×1＝0

1×1＝1

例1104求

(1110)2

乘(101)2

之积

解：

1

1

1

0

×

1

0

1

1

1

1

0

0

0

0

0

+

1

1

1

0

1

0

0

0

1

1

0

你也可以先把二进制的数换算成10进制再相加，得出结果再换算成二进制。

#include <stdioh>

#include <stdlibh>

#include <timeh>

int add(int num1,int num2)//加法

{

return num1+num2;

}

int subtraction(int num1,int num2)//减法

{

return num1-num2;

}

int mul(int num1,int num2)//乘法

{

return num1num2;

}

float divis(int num1,int num2)//除法

{

return ((int)(((float)num1/num2)100+05))/1000;

}

int main()

{

int type = -1;

int data = -1;

int choice,num1,num2,results;

float div_result;

int right = 0;

int wrong = 0;

char ch;

printf("欢迎进入四则运算题，现在开始爆发你的小宇宙吧！\n");

srand((unsigned int)time(NULL));

while(1)

{

printf("请选择运算类型：1加法 2减法 3乘法 4除法(保留两位小数)\n");

scanf("%d",&choice);

printf("请选择位数：1一位数 2两位数\n");

scanf("%d",&data);

switch (choice)

{

case 1:

if(data == 1)

{

num1 = rand()%10;

num2 = rand()%10;

printf("%d + %d=____\n",num1,num2);

scanf("%d",&results);

if(results == add(num1,num2))

{

printf("回答正确！\n");

right++;

}

else

{

printf("回答错误！\n");

wrong++;

}

printf("是否继续？y/n\n");

getchar();

scanf("%c",&ch);

if(ch == 'y')

break;

else if(ch == 'n')

goto end;

}

else if (data == 2)

{

num1 = rand()%100;

num2 = rand()%100;

printf("%d + %d=____\n",num1,num2);

scanf("%d",&results);

if(results == add(num1,num2))

{

printf("回答正确！\n");

right++;

}

else

{

printf("回答错误！\n");

wrong++;

}

printf("是否继续？y/n\n");

getchar();

scanf("%c",&ch);

if(ch == 'y')

break;

else if(ch == 'n')

goto end;

}

break;

case 2:

if(data == 1)

{

num1 = rand()%10;

num2 = rand()%10;

printf("%d - %d=____\n",num1,num2);

scanf("%d",&results);

if(results == subtraction(num1,num2))

{

printf("回答正确！\n");

right++;

}

else

{

printf("回答错误！\n");

wrong++;

}

printf("是否继续？y/n\n");

getchar();

scanf("%c",&ch);

if(ch == 'y')

break;

else if(ch == 'n')

goto end;

}

else if (data == 2)

{

num1 = rand()%100;

num2 = rand()%100;

printf("%d - %d=____\n",num1,num2);

scanf("%d",&results);

if(results == subtraction(num1,num2))

{

printf("回答正确！\n");

right++;

}

else

{

printf("回答错误！\n");

wrong++;

}

printf("是否继续？y/n\n");

getchar();

scanf("%c",&ch);

if(ch == 'y')

break;

else if(ch == 'n')

goto end;

}

break;

case 3:

if(data == 1)

{

num1 = rand()%10;

num2 = rand()%10;

printf("%d %d=____\n",num1,num2);

scanf("%d",&results);

if(results == mul(num1,num2))

{

printf("回答正确！\n");

right++;

}

else

{

printf("回答错误！\n");

wrong++;

}

printf("是否继续？y/n\n");

getchar();

scanf("%c",&ch);

if(ch == 'y')

break;

else if(ch == 'n')

goto end;

}

else if (data == 2)

{

num1 = rand()%100;

num2 = rand()%100;

printf("%d %d=____\n",num1,num2);

scanf("%d",&results);

if(results == mul(num1,num2))

{

printf("回答正确！\n");

right++;

}

else

{

printf("回答错误！\n");

wrong++;

}

printf("是否继续？y/n\n");

getchar();

scanf("%c",&ch);

if(ch == 'y')

break;

else if(ch == 'n')

goto end;

}

break;

case 4:

if(data == 1)

{

num1 = rand()%10;

num2 = rand()%10+1;

printf("%d / %d=____\n",num1,num2);

scanf("%f",&div_result);

if(div_result == divis(num1,num2))

{

printf("回答正确！\n");

right++;

}

else

{

printf("回答错误！\n");

wrong++;

}

printf("是否继续？y/n\n");

getchar();

scanf("%c",&ch);

if(ch == 'y')

break;

else if(ch == 'n')

goto end;

}

else if (data == 2)

{

num1 = rand()%100;

num2 = rand()%100+1;

printf("%d / %d=____\n",num1,num2);

scanf("%f",&div_result);

if(div_result == divis(num1,num2))

{

printf("回答正确！\n");

right++;

}

else

{

printf("回答错误！\n");

wrong++;

}

printf("是否继续？y/n\n");

getchar();

scanf("%c",&ch);

if(ch == 'y')

break;

else if(ch == 'n')

goto end;

}

break;

default :

printf("输入错误！\n");

break;

}

}

end:

printf("回答正确%d题，回答错误%d题\n",right,wrong);

printf("\n====================谢谢光临====================！\n");

system("pause");

return 0;

}

//注意除法是采用四舍五入的，有什么不明白的再问吧，望采纳！

#include<iostream>

#include<ctime>

#include<cstring>

using namespace std;

void main()

{

char ch='/';//+ - / 43,45,42,47

int temp1,temp2,answer;

cout<<"input your answer,quit by -1"<<endl;

srand((unsigned int)time(NULL));

do{

int temp=rand()%8;

if(temp==2||temp==3||temp==5||temp==7)

{

temp1=rand()%10;

temp2=rand()%10;

cout<<temp1<<char(temp+40)<<temp2<<"=";

cin>>answer;

if(answer==-1)break;

else{

switch(char(temp+40))

{

case '+':if(answer==(temp1+temp2))cout<<"right,next title:"<<endl;else cout<<"wrong!"<<endl;break;

case '-':if(answer==(temp1-temp2))cout<<"right,next title:"<<endl;else cout<<"wrong!"<<endl;break;

case '':if(answer==(temp1temp2))cout<<"right,next title:"<<endl;else cout<<"wrong!"<<endl;break;

case '/':if(answer==(temp1/temp2))cout<<"right,next title:"<<endl;else cout<<"wrong!"<<endl;break;

}

}

}

}while(1);

}

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