cpp-puzzle

32 posts

Increment a number without using ++ or +

Last Updated: 11 July 2025

The task is to Increment a number without using ++ and + operators.Examples:Input : 3Output : 4Input : 9Output : 10The idea is based on the fact that the negative numbers ...read more

Print 1 to 100 without loop using Goto and Recursive-main

Last Updated: 06 April 2023

Our task is to print all numbers from 1 to 100 without using a loop. There are many ways to print numbers from 1 to 100 without using a loop. Two of them are the goto stat...read more

DSA

cpp-puzzle

Print a character n times without using loop, recursion or goto in C++

Last Updated: 05 December 2022

Given a character c and a number n, print the character c, n times. We are not allowed to use loop, recursion, and goto. Examples :Input : n = 10, c = 'a'Output : aaaaaaaa...read more

Why "using namespace std" is considered bad practice

Last Updated: 29 March 2024

The statement using namespace std is generally considered bad practice. The alternative to this statement is to specify the namespace to which the identifier belongs using...read more

Calculate range of data types using C++

Last Updated: 12 January 2018

C++ program for printing the range data type like int, char, short.Signed Data TypesMETHOD1.) calculate total number of bits by multiplying sizeof with 8 (say n)2.) Calcul...read more

Measure execution time of a function in C++

Last Updated: 04 July 2026

Measuring the execution time of a function is useful for analyzing performance and comparing different implementations. In modern C++, the chrono library introduced in C++...read more

C++

CPP-Library

cpp-puzzle

Print system time in C++ (3 different ways)

Last Updated: 10 December 2018

First MethodPrinting current date and time using time()Second MethodCPP // CPP program to print current date and time// using time and ctime.#include stdio.h#in...read more

Print a number 100 times without using loop, recursion and macro expansion in C?

Last Updated: 21 June 2022

It is possible to solve this problem using loop or a recursion method. And we have already seen the solution using #define directive (Macro expansion) but what if all thre...read more

C++

c-puzzle

cpp-puzzle

Maximum of four numbers without using conditional or bitwise operator

Last Updated: 31 October 2023

Given four numbers, print the maximum of the 4 entered numbers without using conditional or bitwise operator (not even ternary operators). Examples: Input : 4 8 6 5Outpu...read more

DSA

cpp-puzzle

programming-puzzle

C/C++ Tricky Programs

Last Updated: 14 March 2024

We may come across various tricky programs in our day-to-day life. Maybe in technical interviews, coding tests, or C/C++ classrooms.Here is a list of such programs:-Print ...read more

C++

c-puzzle

cpp-puzzle

Programming puzzle (Assign value without any control statement)

Last Updated: 20 July 2022

Given four integers 'a', 'b', 'y' and 'x', where 'x' can only be either zero or one. Your task is as follows:If 'x' is zero assign value 'a' to the variable 'y'If 'x' is o...read more

Aptitude

cpp-puzzle

programming-puzzle

Using return value of cin to take unknown number of inputs in C++

Last Updated: 23 June 2022

Consider a problem where we need to take an unknown number of integer inputs.A typical solution is to run a loop and stop when a user enters a particular value. How to do ...read more

Print "Hello World" with empty or blank main in C++

Last Updated: 14 June 2022

Write a program in C++ that prints "Hello World", it has a main function and body of main function is empty.Following are three different solutions.We can create a global ...read more

Misc

C++

cpp-puzzle

Implementing ternary operator without any conditional statement

Last Updated: 16 June 2022

How to implement ternary operator in C++ without using conditional statements.In the following condition: a ? b: cIf a is true, b will be executed.Otherwise, c will be exe...read more

Execute both if and else statements in C/C++ simultaneously

Last Updated: 13 September 2023

Write a C/C++ program that executes both if-else block statements simultaneously.Syntax of if-else statement in C/C++ language is:if (Boolean expression){ // Statement ...read more

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