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Check if the String Numeric or Alphabetic

Code

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

void classify_string(const char *str) {
    // Your logic here
    int i,digit=0,alpha=0,mixed=0;
    for(i=0;str[i];i++)
    {
        if(str[i]>='0' && str[i]<='9')
        digit=1;
        else if((str[i]>='A' && str[i]<='Z')||(str[i]>='a'&& str[i]<='z'))
        alpha=1;
        else
        {
        mixed=1;
        break;
        }
    }
    if(mixed ||(digit && alpha))
    printf("MIXED");
    else if(digit)
    printf("NUMERIC");
    else if(alpha)
    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

int i,digit=0,alpha=0,mixed=0;

    for(i=0;str[i];i++)

    {

        if(str[i]>='0' && str[i]<='9')

        digit=1;

        else if((str[i]>='A' && str[i]<='Z')||(str[i]>='a'&& str[i]<='z'))

        alpha=1;

        else

        {

        mixed=1;

        break;

        }

    }

    if(mixed ||(digit && alpha))

    printf("MIXED");

    else if(digit)

    printf("NUMERIC");

    else if(alpha)

    printf("ALPHABETIC");

    else

    printf("MIXED");

 

 

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Input

123456

Expected Output

NUMERIC