C 二进制字符串编程

Question

我有一个 C 程序，它接受字符串输入，我想检查这些输入是否是二进制值，我该如何处理？

例如，如果用户输入“1001”，我如何检查它是否是二进制文件，请尝试不使用指针，也请在 c 中执行，也不要使用数学库

到目前为止@Mywork我将字符串转换为整数并使用 atoi 函数这是我用来检查整数的函数

@程序重新解释我正在使用 scanf 函数接收两个输入并将它们存储为字符串 用户应该输入两个二进制数。然后我想检查并确保这些数字都是二进制的。以下是一些示例

INput: 101001 100101
Both Stored As String.
Output:function checks and see thats they are both binary

     That is a correct way I want it to run. Here is another example
   Input:1001hshds101 100101
   Both stored as String
   Output: Checks both strings and knows that the first string is wrong







//SOme of my work (ignore this for the most part)
int binCheck(long long int input){
      int dv;
       while(input! = 0){
        dv = input%10;
       if(dv>1){
           return 0;
          }
       input = input/10;
    }
    return 1;
    }

Answer 1

不要使用atoi()。只需循环遍历字符串的每个字符并确保每个字符是“0”或“1”。下面的例子。

#include <stdio.h>
#include <string.h>

int isBinary( char *value );


int isBinary( char *value )
{
    int i;
    int bIsBinary = 0;
    int len;

    bIsBinary = 1;

    len = strlen( value );
    for( i = 0; i != len; i++ )
    {
        if ( value[i] != '0' && value[i] != '1' )
        {
            bIsBinary = 0;
            break;
        }
    }
    return( bIsBinary );
}


int main (void)
{
    char *value = "101a001";
    int isBin;

    isBin = isBinary( value );
    printf( "[%s] is Binary::%s\n", value, (isBin) ? "true":"false" );

    return( 0 );
}