User Login System in C programming language

In this program, we create a login system program which takes username and password from the user.

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

int main(){
	char username[20];
	char userpassword[20];
	int i;
	
	printf("Enter the User Name : ");
	gets(username);
	
	printf("Enter the Password : ");
	gets(userpassword);
	
	printf("\n\n****\tEnter Any Key to Continue\t****");
	getch();
	
	if(!strcmp(username, "exampleuser") && !strcmp(userpassword, "example123")){
		printf("\n\n****\tLogin Successful\t****");
	}else{
		printf("\n\n****\tProvided Information Incorrect. Please Provide Right Information!!\t****");
	}
	return 0;
}

take username and password from the user
after taking the value from the user then compare the value is correct or not
if value is correct then "Login Successful" otherwise
"Invalid Credientials"

Comments

Login is mandatory to comment Please login

program to print a message without using semicolor.png

Program to print a message without using semicolon in c programming

How to write a c program to print a message without using semicolon in c programming language.

call by value function in c programming.png

Function call by value in c programming language

The call by value technique of passing arguments to a function copies the particular value of an argument into the formal parameter of the function.

call by reference function in c programming.png

Call by Reference in C programming language

When we call a function and pass the variable / parameter in the function, when passing the address of the actual arguments from the calling function, that's why it is called call by reference.