Write a program to count total number of alphabets, digits or special characters in a string using loop

Write a program to count total number of alphabets, digits or special characters in a string using loop

1. #include <stdio.h>
2. #include <string.h>
3.  
4. void main()
5. {
6.     char str[100];
7.     int alph, digit, splch;
8.     int len;
9.         alph=0;
10.         digit=0;
11.         splch=0;
12.         len=0;
13.    
14.     printf("Count total number of alphabets, digits and special characters :\n");
15.     printf("Input the string : ");
16.     gets(str);
17.     len=strlen(str);
18.  
19.     for(int i=0; i < len; i++) {
20.         if ((str[i] >= 'a' && str[i] <= 'z') || (str[i] >= 'A' && str[i] <= 'Z'))
21.             alph++;
22.         else if (str[i] >= '0' && str[i] <= '9')
23.             digit++;
24.         else
25.             splch++;
26.     }
27.     //Check each character of string
28.     printf("Number of Alphabetics in the string is : %d\n", alph);
29.     printf("Number of Digits in the string is : %d\n", digit);
30.     printf("Number of Special characters in the string is : %d\n\n", splch);
31. }