"Invalid Entry" message was placed before checking the validity of the postal code. This caused the message to be printed even if the postal code was valid in my output. I need some help for my code to work as corrected output

 

#define _CRT_SECURE_NO_WARNINGS

#include

#include

#include

#include

 

struct Customer {

    char first_name[50];

    char last_name[50];

    char street_address[100];

    char city[50];

    char province[3];

    char postal_code[8];

};

 

int isValidPostalCode(char postal_code[7]);

 

struct Customer getCustomerInfo(void) {

    struct Customer customer;

 

    printf("Enter your first name: ");

    fgets(customer.first_name, sizeof(customer.first_name), stdin);

    customer.first_name[strcspn(customer.first_name, "\n")] = '\0';

 

    while (1) {

        printf("Enter your last name: ");

        fgets(customer.last_name, sizeof(customer.last_name), stdin);

        customer.last_name[strcspn(customer.last_name, "\n")] = '\0';

 

        if (strlen(customer.last_name) > 0) {

            break;

        } else {

            printf("Invalid Entry: ");

        }

    }

 

    printf("Enter your street address: ");

    fgets(customer.street_address, sizeof(customer.street_address), stdin);

    customer.street_address[strcspn(customer.street_address, "\n")] = '\0';

 

 

    printf("Enter your city: ");

    fgets(customer.city, sizeof(customer.city), stdin);

    customer.city[strcspn(customer.city, "\n")] = '\0';

 

 

    printf("Enter your province: ");

    fgets(customer.province, sizeof(customer.province), stdin);

    customer.province[strcspn(customer.province, "\n")] = '\0';

 

    while (1) {

        printf("Enter your postal code: ");

        fgets(customer.postal_code, sizeof(customer.postal_code), stdin);

        customer.postal_code[strcspn(customer.postal_code, "\n")] = '\0';

 

        if (isValidPostalCode(customer.postal_code)) {

            break;

        } else {

            printf("Invalid Entry: ");

        }

    }

 

    return customer;

}

 

int isValidPostalCode(char postal_code[8]) {

    int i;

 

    for (i = 0; i < 6; i++) {

        postal_code[i] = toupper(postal_code[i]);

    }

 

    if (isalpha(postal_code[0]) && isdigit(postal_code[1]) && isalpha(postal_code[2]) &&

        postal_code[3] == ' ' &&

        isdigit(postal_code[4]) && isalpha(postal_code[5]) &&

        strlen(postal_code) == 7) {

        return 1;

    } else {

        return 0;

    }

}

 

int main(void) {

    struct Customer customer = getCustomerInfo();

   

    printf("\nYou entered:\n%s %s\n%s,\n%s, %s,\n%s\n",

           customer.first_name, customer.last_name,

           customer.street_address,

           customer.city, customer.province,

           customer.postal_code);

 

    return 0;

}

My Output

Enter your first name: John
Enter your last name:
Invalid Entry: Enter your last name: Smith
Enter your street address: 25 Elm St.
Enter your city: Toronto
Enter your province: ON
Enter your postal code: Invalid Entry: Enter your postal code: m2e44x
Invalid Entry: Enter your postal code: m2e 4x4

You entered:
John Smith
25 Elm St.,
Toronto, ON,
M2E 4X4
Program ended with exit code: 0
 

Corrected Output

Enter your first name: John
Enter your last name:
Invalid Entry: Enter your last name: Smith
Enter your street address: 25 Elm St.
Enter your city: Toronto
Enter your province: ON
Enter your postal code: m2e44x
Invalid Entry: Enter your postal code: m2e 4x4

You entered:
John Smith
25 Elm St.,
Toronto, ON,
M2E 4X4