c - 如何从用户那里获取两个二进制数和运算并给出答案

Question

我正在对 C 编程进行作业，该作业对两个二进制数进行操作(+，-，*，/)，例如，如果用户输入:“1001 + 1010”必须添加两个二进制文件并给出输出“010011”

我的代码只能逐步获取每个输入(获取第一个二进制文件，然后获取第二个二进制文件并选择操作(+，-，*，/)，然后生成答案)并生成答案，但作业认为需要整个立即(1001 + 1010并给出答案010011)

#include <stdio.h>

int main()

{

    int num, num2, binary_val, binary_val2, decimal_val = 0, decimal_val2 = 0, base = 1, rem, base2 = 1, rem2, sum;
    char oprtr;

    printf("Enter the first binary number(1s and 0s) \n");

    scanf("%d", &num);

    binary_val = num;
    printf("Enter the second binary number(1s and 0s) \n");

    scanf("%d", &num2);
    binary_val2 = num2;

    printf("choose operation +,-,/,* \n");

    scanf("%char", &oprtr);

    while (num > 0)

    {

        rem = num % 10;

        decimal_val = decimal_val + rem * base;

        num = num / 10;

        base = base * 2;
    }
    while (num2 > 0)

    {

        rem2 = num2 % 10;

        decimal_val2 = decimal_val2 + rem2 * base2;

        num2 = num2 / 10;

        base2 = base2 * 2;
    }

    if (oprtr == '+')
    {
        sum = decimal_val + decimal_val2;
    }
    else if (oprtr == '*' || oprtr == 'x' || oprtr == 'X')
    {
        sum = decimal_val * decimal_val2;
    }
    else if (oprtr == '-')
    {
        sum = decimal_val * decimal_val2;
    }
    else if (oprtr == '/')
    {
        sum = decimal_val / (float)decimal_val2;
    }
    else
    {
        printf("error");
    }

    int decimal_num, remainder, binary = 0;

    while (sum > 0)

    {

        remainder = num % 2;

        /*  To count no.of 1s */

        if (remainder == 1)

            binary = binary + remainder * base;

        sum = sum / 2;

        base = base * 10;
    }

    printf("The Binary number of the first one is = %d \n", binary_val);
    printf("The Binary number of the second one is  = %d \n", binary_val2);

    printf("Its decimal equivalent is = %d \n", decimal_val);
    printf("Its decimal equivalent is = %d \n", decimal_val2);

    printf("And their Value is = %d \n", sum);
}

Answer 1

在读取运算符之前，您必须绕过第二个数字后输入的\n，例如 getchar(); optrr = getchar(); 而不是您的 scanf

您将始终打印 value 为 0，因为您打印的是总和而不是二进制

您错过了在上次之前将基数重置为 1

附加说明

• 要将两个数字从二进制转换为十进制，您编写了两次相同的代码，最好添加专用函数
• 要求在一行中输入 num1{opr}num2 会更简单，因为您只需执行一次唯一的 scanf : scanf("%d%c%d", &num, &optrr, &num2 );