C Foundation

What is C? C Compiler Installation C Extensions C Compiler C Interpreter C Program Structure

C Basics

C Keywords C Data Types C Identifiers C Variables C Constant C Escape Sequences C Constant and Volatile C Typecast


What is Operator C Comma Operator C Arithmetic Operators C Relational Operators C Logical Operators C Bitwise Operators C Conditional Operators C : : Operator C Operator Priority

Basic IO's

Basic IO's C Formatted Functions C Unformatted Functions C Common Functions

Control Statements

What is Control Statement C if Statement C if else Statement C Nested if Statement C Else if Statement C Break Statement C Continue Statement C Switch Statement C Goto Statement


What is Control Loop C for Loop C Nested for Loop C while Loop C Nested while Loop C do while Loop C Nested do while loop


What is Function C User Defined Functions C Recursion C Passing Parameters


Scope C Local Scope C Global Scope

Storage Classes

What is Storage Class C Auto C Extern C Static C Register


What is Array C One Dimensional Array C Two Dimensional Array C Multi Dimensional Array C Arrays Of Strings


What is String C String Functions


What is Pointer C Pointers Arithmetic C Pointer to Pointer C Pointers and Arrays C Pointers and Strings C Pointer to Functions Void Pointers Null Pointers C Null and Void Pointer


What is Structure C Struct within Struct C Array within Structure C Pointer to Structure C Structure and Function C Enum C Bitfield Structure C Type def


What is Union


What is File C read a file C write a file C File Handling C Error Handling C Low Level Disk I/O C Other file functions

Memory Allocation

What is Memory Allocation C Malloc() C Calloc() C Free() C Realloc() C Coreleft()

C Reference

All ASCII Code Basic C Questions

C Interview

C Interview Sets All Star Patterns All Number Patterns All Alphabet Patterns All Series Patterns
The ones who are crazy enough to think they can change the world are the ones who do.
- Steve Jobs

Password In C

Why Password Masking?

Password masking is a very vital in login page. It involves a text field which accepts any character however doesn't show the inputted character to the user. Instead it reflect with dot or any user defined special character for every key pressed by the user.

Password Program

C Program - Password Masking

Let us write a c program to Mask the user pressing keys.

#include <stdio.h>
#include <conio.h>
int main()
char password[10], username[10], ch;
int i, j;
printf("Email id : ");
printf("Password : ");
for(i = 0;i < 100;i++)
ch = getch();
if(ch == 13)
password[i] = ch;
ch = '*' ;
printf("%c ", ch);
password[i] = '\0';
printf("\nYour password is hacked : ");
for(j = 0;j < i;j++)
printf("%c ", password[j]);
return 0;
Email id : example@gmail.com
Password : ***********
Your password is hacked: 2braces.com


Here we used array to store user entered Name and Password. Every single characters of user entered password are gotten by getch() and stored in array Password[], simultaneously we are outputting with '*'.

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