C-programming/String Database Example at main · Mirzo001/C-programming · GitHub

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#include <stdio.h>

#include <stdlib.h>

#include <string.h>


// my small database which is GLOBAL

char un1[30] = "Rebeca";

char pw1[30] = "R334vm";


char un2[30] = "dilmorad";

char pw2[30] = "d123d123";


char un3[30] = "Emmanual";

char pw3[30] = "ntum1emma";


int checkIdentity(char un[], char pw[])

{

// check the inputs and tell us which item is wrong

// it returns 1 if both are correct

// it returns -1 if un is wrong

// it returns -2 if pw is wrong

if ((strcmp(un,un1) == 0) && (strcmp(pw,pw1) == 0))

return 1;

if (strcmp(un,un1) != 0)

return -1;

if ((strcmp(un,un1) == 0) && (strcmp(pw,pw1) != 0))

return -2;

}


int main()

{

// username and password variables

char username[30] = "";

char password[30] = "";

printf("Welcome to our company!\n");

printf("Please enter your username: ");

gets(username);


printf("Thank you! Please enter your password: ");

gets(password);


if (checkIdentity(username, password) == 1)

    printf("Congradulation! You have been successfully logged in!\n");

else if (checkIdentity(username, password) == -1)

    printf("Wrong username!\n");

else if (checkIdentity(username, password) == -2)

    printf("Wrong password!\n");


return 0;

}