如何檢查字符串中的特殊字符？

Question

當我的輸入存儲在指針中時，如何檢查字符串中是否有特殊字符？ 我嘗試了這段代碼，但似乎它只會檢查第一個字符而不是整個字符串。

void EmployeeDetails(int count, account_s record[count]){  /* Function to get employee details */
    
    int i;
    char ch;
    EmployeeName: 
    for(i = 0; i < count; i++){ // count here is the amount of employee from main function      
        
        printf("\nEnter employee name: "); 
        scanf("%s", record[i].EmpName);
        ch = record[i].EmpName[i];
     
        if((ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z')){

Answer 1

你可能想要這樣的東西：

void EmployeeDetails(int count, account_s record[count]){  /* Function to get employee details */
    
    int i;
    EmployeeName: 
    for(i = 0; i < count; i++){ // count here is the amount of employee from main function      
        
        printf("\nEnter employee name: "); 
        scanf("%s", record[i].EmpName);

        for (j = 0; j < strlen(record[i].EmpName); j++)
        {
          char ch = record[i].EmpName[j];
          if((ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z')){
            ...
        }

但最好的方法是使用標准函數並將if((ch >= 'a'替換為：

if (!isalpha(ch)) {
   ...

更好的是：將字符串中是否有特殊字符的檢查外包給 function：

將整個for (j = loop 替換為：

   if (ContainsSpecialChars(record[i].EmpName)) {
      ...

ContainsSpecialChars為：

int ContainsSpecialChars(const char name[])
{
   // Returns 1 if name contains a special character. Otherwise returns 0.
   //
   // I let you write this as an exercise
}

不要忘記#include <ctypes.h>用於isalpha function。