Thread: Login Function

ok i've made a login function which checks the username and password before allowing user to enter the main menu.. i was able to make it check the password.. but not the username... error given was.. "Cannot convert "int" to "char *" in function main().. could anyone help ?

i'm using string ... heres the code

Code:

void main(void)
{

char user[8];
int password,valid,Try=1;

do{
	clrscr();
	printf("Control Panel");
                printf("Username : ");
	fflush(stdin);
	gets(user);
	gotoxy(25,8);
	printf("Password : ");
	scanf("%i",&password);
	if(password != 888 && user != 'geekz' )
	{
		gotoxy(25,10);
		printf("Invalid Username/Password Entered.");
		valid = 0;
		Try += 1;
	}
	else
		valid=1;
	}while(!valid && Try <=3 );
	if(Try>3)
		printf("\n\t\t\tMaximum 3 try only!");
	else
		printf("\n\n\t\t\tAccess Approved.");
		menu();
}

i haf another question.. issit possible to compare(strcmp() a string and a int ? as i am trying to make a search as to search by ID(int)...heres the code

Code:

void search(void)
{
	if((cusfile = fopen("a:\\customer.dat","r"))== NULL)
			printf("There Are Currently No Customer In The Database");
	else
	{
		clrscr();
		printf("Enter ID/Name : ");
		fflush(stdin);
		gets(Target);
		while(!feof(cusfile) && Found == 0 )
		{
			fscanf(cusfile, "%s , customer.name);
				if(strcmp(Target,cus.cus_id) == 0 || strcmp(Target,cus.cus_name) == 0 )
			Found = 1;
		}
		if (Found)
		{
		printf("ID : %04i",customer.id);
		printf("Name : %s",customer.name);

Wow, that code uses just about every evil construct that we violently attack on a daily basis.

>issit possible to compare(strcmp()) a string and a int ?
Not with strcmp directly. You could convert the int to a string or the string to an int and then do the comparison. But it looks like you want the user to be able to enter either an ID or a name. In that case it might be easier to try to convert and use that as your validation:

Code:

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define CORRECT_ID   12345
#define CORRECT_NAME "Robin Cole"

int main(void)
{
  char buffer[BUFSIZ];

  printf("Enter your User ID or User Name: ");
  fflush(stdout);
  if (fgets(buffer, sizeof buffer, stdin)) {
    char          *endp;
    char          *newline;
    unsigned long  id;
    newline = strchr(buffer, '\n');
    if (newline) {
      *newline = '\0';
    }
    id = strtoul(buffer, &endp, 0);
    if (endp == buffer) { /* User Name was entered */
      if (strcmp(buffer, CORRECT_NAME) == 0) {
        printf("Logging in...\n");
      }
      else {
        printf("Sorry, incorrect User Name\n");
        return EXIT_FAILURE;
      }
    }
    else {                /* User ID was entered */
      if (id == CORRECT_ID) {
        printf("Logging in...\n");
      }
      else {
        printf("Sorry, incorrect User ID\n");
        return EXIT_FAILURE;
      }
    }
  }

  return EXIT_SUCCESS;
}