C语言编程：100以内的进位加法和借位减法？ C语言 100以内加减法
C\u8bed\u8a00\u7f16\u7a0b 100\u4ee5\u5185\u6574\u6570\u52a0\u51cf\u6cd5\u8fd9\u5bf9\u4e8e\u521d\u5b66\u8005\u8fd8\u771f\u4e0d\u7b80\u5355\uff1b\u8981\u4ea7\u751f\u771f\u6b63\u7684\u968f\u673a\u6570\uff0c\u5fc5\u987b\u7528\u65f6\u95f4\u51fd\u6570\u521d\u59cb\u5316\u968f\u673a\u79cd\u5b50\uff0c\u8fd8\u6709\u76f8\u5e94\u63d0\u793a\u7b49\u3002\u4f60\u53c2\u8003\u4e0b\u4e0b\u9762\u7684\u4ee3\u7801\uff1a
#include#include#includeint main(){ int i,a[20],answer,score=0; srand(time(NULL)); for(i=0;ia[i+1])//\u4fdd\u8bc1\u4e0d\u51fa\u73b0\u5c0f\u7684\u6570\u51cf\u5927\u7684\u6570 printf("%d-%d=",a[i],a[i+1]); else printf("%d-%d=",a[i+1],a[i]); scanf("%d",&answer); if(a[i]-a[i+1]==answer) score+=10;//\u5bf9\u4e86\u52a010\u5206 } switch(score){ case 100: printf("\u9177\u6bd9\u4e86\uff01\uff01\n");break; case 80: case 90: printf("\u771f\u68d2\uff01\n");break; case 60: case 70: printf("\u771f\u4e0d\u9519\u54e6\uff01\uff01\uff01\n");break; default: printf("\u8981\u52a0\u6cb9\u54e6\uff01\n"); } return 0;}
\u600e\u4e48\u8fd8\u95ee\u5462\uff1f\u4e0d\u662f\u5df2\u7ecf\u5e2e\u4f60\u4e86\u5417\uff1f
#include
#include
#include
int jia()
{int num1,num2,num;
system("cls");
srand(time(NULL));
do
{
num1=rand()%100;
num2=rand()%100;
num=num1+num2;
}while(num>100);
printf("%d+%d=",num1,num2);
return num;
}
int jian()
{int num1,num2,num;
system("cls");
srand(time(NULL));
do
{
num1=rand()%100;
num2=rand()%100;
num=num1-num2;
}while(num>100||num<0);
printf("%d-%d=",num1,num2);
return num;
}
int cheng()
{int num1,num2,num;
system("cls");
srand(time(NULL));
do
{
num1=rand()%100;
num2=rand()%100;
num=num1*num2;
}while(num>100);
printf("%d*%d=",num1,num2);
return num;
}
main()
{int a,c,i,n,r;
float aver,grade=0;
srand(time(NULL));
printf("\u8bf7\u8f93\u5165\u9898\u76ee\u6570\u91cf\uff1a");
scanf("%d",&n);
aver=100.0/n;//\u767e\u5206\u5236
for(i=0;i<n;i++)
{c=rand()%(10/3);
switch(c)
{
case 0:r=jia();break;
case 1:r=jian();break;
case 2:r=cheng();break;
}
scanf("%d",&a);
if(a==r)
grade+=aver;
}
system("cls");
printf("\u6210\u7ee9\uff1a%.1f\n",grade);
}
代码文本：
#include "stdio.h"
#include <stdlib.h>
#include "time.h"
int main(int argc,char *argv[]){
int i,a,b,x,y,n;
printf("How many pages...
");
if(scanf("%d",&n) && n<1)
return 0;
srand((unsigned)time(NULL));
while(n--){
printf("班级： 姓名: 学号： 时间：
");
for(i=0;i<17;i++){
if(rand()&1){
a=10*(x=rand()%9)+(y=rand()%9+1);
b=10*(rand()%(9-x))+9-rand()%y;
printf("%2d+%2d=",a,b);
}
else{
a=10*(x=rand()%9+1)+(y=rand()%9);
b=10*(rand()%x)+rand()%(9-y)+y+1;
printf("%2d-%2d=",a,b);
}
printf(" ");
if(rand()&1){
a=10*(x=rand()%9)+(y=rand()%9+1);
b=10*(rand()%(9-x))+9-rand()%y;
printf("%2d+%2d=
",a,b);
}
else{
a=10*(x=rand()%9+1)+(y=rand()%9);
b=10*(rand()%x)+rand()%(9-y)+y+1;
printf("%2d-%2d=
",a,b);
}
}
}
return 0;
}
思路：直接生成两个两位随机数，应该更简单些。
#include "stdafx.h"
#include <time.h>
#include <iostream>
using namespace std;
int main()
{
int a, b,n=0;
srand((unsigned int)time(NULL));
cout << "输入页数
";
cin >> n;
while (n)
{
cout << "姓名：" << " " << "班级：" << endl;
for (int i = 0;i < 17;i++)
{
for (int j = 0;j < 2;j++)
{
a = rand() % 99 + 1;
b = rand() % 99 + 1;
if (a > b && ((a - a / 10 * 10) < (b - b / 10 * 10)))
cout << a << "-" << b << "= ";
else if (((a - a / 10 * 10) + (b - b / 10 * 10)) > 9 && ((a / 10 + b / 10) < 9))
cout << a << "+" << b << "= ";
else
j--;
}
cout << endl;
}
n--;
cout << endl;
}
system("pause");
return 0;
}
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