Thread: Loop comparing 2 strings?

I am currently a student learning c, and I had to make a struct loop to collect info for 10 customers, then prompt the user to input a two-digit state code, and then have the program output every entry that used that state code. I was able to do the first part, but the second just isn't working. I know I'm missing something (probably simple), but I don't know what.

I've tried building an array and comparing values (that didn't work), and also setting up a simple char value and comparing that (and that didn't work). What am I missing?

Code:

#include <stdio.h>
#include <stdlib.h>
#define NAME_LEN 10


int main() {

    typedef struct
    {
        char firstName[30];
        char lastName[30];
        char street[35];
        char city[20];
        char state[4];
        int zip [15];
        char phone[15];
        int accountId[40];
    } Customer;

    int myIntArray[NAME_LEN] = {0};
    Customer custArray[NAME_LEN];
    int i = 0, n = 0, lenOfStr = 0;
    char state, stateArray [4];

    for(i = 0; i < NAME_LEN; ++i)
    {
        printf("Enter Information for Customer %d\n", i + 1);
        printf ("First Name: ");
        fgets (custArray[i].firstName, 30, stdin);
        lenOfStr = strlen (custArray[i].firstName);
        custArray[i].firstName[lenOfStr - 1] = '\0';
        printf ("Last Name: ");
        fgets (custArray[i].lastName, 30, stdin);
        lenOfStr = strlen (custArray[i].lastName);
        custArray[i].lastName[lenOfStr - 1] = '\0';
        printf ("Address: ");
        fgets (custArray[i].street, 35, stdin);
        lenOfStr = strlen (custArray[i].street);
        custArray[i].street[lenOfStr - 1] = '\0';
        printf ("City: ");
        fgets (custArray[i].city, 20, stdin);
        lenOfStr = strlen (custArray[i].city);
        custArray[i].city[lenOfStr - 1] = '\0';
        printf ("Two-Digit State Code (ex. CO for Colorado, OR for Oregon): ");
        fgets (custArray[i].state, 4, stdin);
        lenOfStr = strlen (custArray[i].state);
        custArray[i].state[lenOfStr - 1] = '\0';
        printf ("Zip Code: ");
        fgets(custArray[i].zip, 15, stdin);
        lenOfStr = strlen (custArray[i].zip);
        custArray[i].zip[lenOfStr - 1] = '\0';
        printf("Phone Number: ");
        fgets (custArray[i].phone, 15, stdin);
        lenOfStr = strlen (custArray[i].phone);
        custArray[i].phone[lenOfStr - 1] = '\0';
        printf("Account Number: ");
        fgets (custArray[i].accountId, 40, stdin);
        lenOfStr = strlen (custArray[i].accountId);
        custArray[i].accountId[lenOfStr - 1] = '\0';
    }

    printf("Enter a Two-Digit State Code (ex. CO for Colorado, OR for Oregon):");
    scanf("%c", &state);
    //fgets (stateArray, 4, stdin);
    //lenOfStr = strlen (stateArray);
    //stateArray[lenOfStr - 1] = '\0';


    //for (i = 0; custArray[i].state == stateArray[i]; i++)
    for (i = 0; custArray[i].state == state; i++)
    {
        printf("Customer: %s, %s \nState: %s", custArray[i].lastName, custArray[i].firstName, custArray[i].state);
    }


    return(0);
}

You need strcmp() to compare strings (or write your own function).
Comparing with the == operator compares the pointers, not the contents.

THANK YOU!!! It worked perfectly (after I realized that 'custArray[i].state == stateArray[i]' needed to be replaced with 'i < NAME_LEN' ).