随机数计算器中，为什么第二次输入字符后会出现文字重复（如图

Question

#include<stdio.h>
#include<stdlib.h>
#include<time.h>
int main()
{
    int a,b;
    char c;
    do
    {
    
        srand(time(0));
        a=rand()%101;
        b=rand()%101;
    
        printf("两个运算数为：%d,%d\n",a,b);
        printf("请输入运算符：\n");
        
        scanf("%c",&c);
        switch(c)
        {
            case'+':printf("%d+%d=%d\n",a,b,a+b);
            break;
            case'-':printf("%d-%d=%d\n",a,b,a-b); 
            break;
            case'*':printf("%d*%d=%d\n",a,b,a*b);
            break;
            case'/':printf("%d/%d=%d\n",a,b,a/b);
            break;
            
        
        }
        

    }
    while(c!='#');

    return 0;


}

Answer 1

scanf后面 加个 getchar()，吸收回车符