Count various types of characters in a string

Posted on Apr 20, 2020

C program to count the number of vowels, consonants, digits, white-spaces and special characters in a string.

Program

#include<stdio.h>
#include<conio.h>
#define MAX 50

void main()
{
	char str[MAX];
    int i, upper, lower, vowel, consonant, digit, white_space, special;

    printf("Enter the string\t:");
    gets(str);

    upper = 0;
    lower = 0;
    vowel = 0;
    consonant = 0;
    digit = 0;
    white_space = 0;
    special = 0;
    i = 0;
    
    while(str[i] != '\0')
    {
        if(str[i]>='A' && str[i]<='Z')
            upper++;
        else if(str[i]>='a' && str[i]<='z')
            lower++;
        if(str[i]=='a' || str[i]=='e' || str[i]=='i' || str[i]=='o' || str[i]=='u' ||
           str[i]=='A' || str[i]=='E' || str[i]=='I' || str[i]=='O' || str[i]=='U')
            vowel++;
        else if((str[i]>='A' && str[i]<='Z') || (str[i]>='a' && str[i]<='z'))
            consonant++;
        else if(str[i]>='0' && str[i]<='9')
            digit++;
        else if(str[i] == ' ')
            white_space++;
        else
            special++;
        i++;
    }

    printf("\nNumber of Uppercase letters\t:%d",upper);
    printf("\nNumber of Lowercase letters\t:%d",lower);
    printf("\nNumber of Vowels\t:%d",vowel);
    printf("\nNumber of Consonants\t:%d",consonant);
    printf("\nNumber of Digits\t:%d",digit);
    printf("\nNumber of White spaces\t:%d",white_space);
    printf("\nNumber of Special Character\t:%d",special);

    getch();
}

Output

Enter the string        :welcome to COURSECRUX.com@2019

Number of Uppercase letters     :10
Number of Lowercase letters     :12
Number of Vowels        :9
Number of Consonants    :13
Number of Digits        :4
Number of White spaces  :2
Number of Special Character     :2