99. Check if the String Numeric or Alphabetic

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Code

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

int isdigit(const char *str){
    while(*str != '\0'){
        if(*str < '0' || *str > '9'){
            return 0;
        }
        str++;
    }
    return 1;
}

int isalpha(const char *str){
    while(*str != '\0'){
        if((*str < 'A' || *str > 'Z') && (*str < 'a' || *str > 'z')){
            return 0;
        }
        str++;
    }
    return 1;
}

void classify_string(const char *str) {
    // Your logic here
    if(isdigit(str)){
        printf("NUMERIC");
    }else if(isalpha(str)){
        printf("ALPHABETIC");
    }else{
        printf("MIXED");
    }
}

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++;
    }

    classify_string(str);
    return 0;
}

Solving Approach

 

 

 

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