The first part of my program i creating 2 different arrays, the login id and password. After that has all been entered I would like the program to have 5 different IF statements that checks the 2 arrays to see if the ID and Password combinations are correct.
I am currently trying it like this for the first one with no success
#include <stdio.h>
#include <conio.h>
#include <string.h>
int main()
{
char id[5];
char password[8];
int i, j, k;
int access;
char c;
printf("Please enter your ID: ");
scanf("%5c", id);
printf("\nPlease enter your password: ");
for(k = 0; k < 8; k++)
{
do
{
c = getch();
if(c != '\n' || c != '\r')
{
password[k] = c;
putchar('*');
break;
}
}while(c != '\n' || c != '\r');
}
for(i = 0; i < 8; i++)
{
if(password[i] >= '0' && password[i] <= '9')
{
password[i] = (char)((password[i] - '0' + 4 )% 10 + '0');
}
if((password[i] >= 'a' && password[i] <= 'z') || (password[i] >= 'A' && password[i] <= 'Z') )
{
password[i] = (char)((password[i] - 'a' + 4) % 26 + 'a');
}
}
if((strcmp(password, "abcdefgh") == 0) && (strcmp(id,"ft234")==0))
{
access = 1;
printf("Logged in.\n\n");
}
else if((strcmp(password, "bcdefghi")==0) && (strcmp(id, "ty394")==0))
{
access = 1;
printf("Logged in.\n\n");
}
}
First problem
In C language you declare strings (arrays of characters) with double-quotes, not simple quotes.
Ex: char string[20] = "my string"
Using simple-quotes declares a single character.
Ex: char ch = 'a'
Second problem
You can't compare strings natively in low-level languages such as C language. You must use strcmp
.
Solution
if ((strcmp(password, "string_passwd") == 0) && (strcmp(login, "string_login") == 0)) {
<both password and login are ok>
} else {
<one (or both) of password or/and login are not ok>
}
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