95. Count Alphabets Digits and Symbols in a String

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Code

#include <stdio.h>
#include <stdint.h>
#include <stdbool.h>

bool is_alpha(const char *str){
    if(((*str>='a') && (*str<='z')) || ((*str>='A') && (*str<='Z')))
        return true;
    return false;
}

bool is_numeric(const char *str){
    if((*str>='0') && (*str<='9'))
        return true;
    return false;
}


void classify_chars(const char *str, uint8_t *alpha, uint8_t *digit, uint8_t *symbol) {
   while(*str){
    if(is_alpha(str)){
        (*alpha)++;
    }
    else if (is_numeric(str)){
        (*digit)++;
    }
    else if(*str==' ')
    {
        
    }
    else{
        (*symbol)++;
    }
    str++;
   }
   
}

int main() {
    char str[101];
    fgets(str, sizeof(str), stdin);

    // Remove newline
    uint8_t i = 0;
    while (str[i]) {
        if (str[i] == '\n') {
            str[i] = '\0';
            break;
        }
        i++;
    }

    uint8_t alpha = 0, digit = 0, symbol = 0;
    classify_chars(str, &alpha, &digit, &symbol);
    printf("Alphabets = %u\nDigits = %u\nSymbols = %u", alpha, digit, symbol);
    return 0;
}

Solving Approach

 

 

 

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