C语言 isxdigit()用法及代码示例

用C编程语言编写的isxdigit()函数检查给定字符是否为十六进制。 isxdigit()函数在ctype.h头文件中定义。

十进制数的十六进制等效项：

Hexadecimal:0   1   2   3    4   5    6   7    8   9    A    B       C      D    E     F
Decimal:   0   1    2   3    4   5    6   7    8   9    10   11    12     13    14    15

用法:

char isxdigit( char x);

例子：

Input:A
Output:Entered character is hexadecimal
Input:2
Output:Entered character is hexadecimal
Input:@
Output:Entered character is not hexadecimal

// C program to demonstrate isxdigit() 
#include <ctype.h> 
#include <stdio.h> 
  
int main() 
{ 
    // taking input 
    char ch = 'A'; 
  
    // checking is the given input is hexadecimal or not? 
    if (isxdigit(ch)) 
        printf("\nEntered character is hexadecimal"); 
    else
        printf("\nEntered character is not hexadecimal"); 
}

输出：

Entered character is hexadecimal

应用：使用C编程语言编写的isxdigit()函数用于查找任何给定输入中存在的十六进制总数。
例：

Input:abc123
Output:Number of hexadecimals present in the given input is:6
Input:abcdef
Output:Number of hexadecimals present in the given input is:6
Input:123456@$
Output:Number of hexadecimals present in the given input is:6

让我们看一下有关此主题的C程序：

// C program to demonstrate isxdigit() 
#include <ctype.h> 
#include <stdio.h> 
  
int ttl_hexadecimal(int i, int counter) 
{ 
    char ch; 
    char a[50] = "@#asf12345"; 
    ch = a[0]; 
  
    // counting of hexadecimal numbers 
    while (ch != '\0') { 
        ch = a[i]; 
        if (isxdigit(ch)) 
            counter++; 
  
        i++; 
    } 
  
    // returning total number of hexadecimal 
    // in the given input 
    return (counter); 
} 
  
int main() 
{ 
    int i = 0; 
    int counter = 0; 
    counter = ttl_hexadecimal(i, counter); 
  
    printf("\nNumber of hexadecimals in string"
             " is:%d", counter); 
    return 0; 
}

输出：

Number of hexadecimals in string is:7

相关用法

注：本文由纯净天空筛选整理自Kanchan_Ray大神的英文原创作品 isxdigit() function in C Language。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。