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C Exercises: Check the password until it is correct

C Basic Declarations and Expressions: Exercise-36 with Solution

Write a C program to read a password until it is correct. For wrong password print "Incorrect password" and for correct password print "Correct password" and quit the program. The correct password is 1234.

C Code:

#include <stdio.h>
int main() {
	int pass, x=10;	

	while (x!=0)
	{
	printf("\nInput the password: ");
	scanf("%d",&pass);	
	
	if (pass==1234)
	{
		printf("Correct password");
		x=0;
    }
    else
    {
       printf("Wrong password, try another");       
	}
	printf("\n");
   }
	return 0;
} 

Sample Output:

Input the password: 1234                                                                             
Correct password

Flowchart:

C Programming Flowchart: Check the password until it is correct

C Programming Code Editor:


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Next: Write a C program to read the coordinate(x, y) (in Cartesian system) and find the quadrant to which it belongs (Quadrant -I, Quadrant -II, Quadrant -III, Quadrant -IV).

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C Programming: Tips of the Day

Static variable inside of a function in C

The scope of variable is where the variable name can be seen. Here, x is visible only inside function foo().

The lifetime of a variable is the period over which it exists. If x were defined without the keyword static, the lifetime would be from the entry into foo() to the return from foo(); so it would be re-initialized to 5 on every call.

The keyword static acts to extend the lifetime of a variable to the lifetime of the programme; e.g. initialization occurs once and once only and then the variable retains its value - whatever it has come to be - over all future calls to foo().

Ref : https://bit.ly/3fOq7XP