🔴 Advanced · Lesson 63

Sorting and Searching in C++

What is Sorting and Searching in C++?

Sorting and Searching in C++
Sorting arranges data in a specific order and searching finds a required value. C++ provides STL algorithms for both.

Level
🔴 STL, Modern C++ and Projects

Example File
sorting-searching.cpp

Main Focus
Concept + syntax + practical C++ program

Why should you learn this?

It helps you write correct and readable C++ programs.
It is used repeatedly in school practicals, projects and competitive programming.
It builds the base for advanced topics such as OOP, STL and data structures.

Important Terms

Term	Meaning / Use
sort	Sorting and Searching in C++ programming में Sort use होता है।
linear search	Sorting and Searching in C++ programming में Linear search use होता है।
binary search	Sorting and Searching in C++ programming में Binary search use होता है।
algorithm	Sorting and Searching in C++ programming में Algorithm use होता है।
complexity	Sorting and Searching in C++ programming में Complexity use होता है।

Syntax / Pattern

C++

sort(v.begin(), v.end()); binary_search(v.begin(), v.end(), value);

Example Program

main.cpp

#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
int main(){
    vector<int> v = {30,10,20};
    sort(v.begin(), v.end());
    cout << binary_search(v.begin(), v.end(), 20);
}

Expected Output

Program Explanation

Data is sorted before binary_search.
binary_search returns true/false.

Exam Tip: In C++ practical answers, write the logic first, then the program, then expected output. For theory, always include one suitable example.

Where will you use it?

rank lists
marks sorting
fast lookup

Common Mistakes

Using binary_search on unsorted data.
Confusing index with value.

Practice Tasks

Sort marks descending.
Implement linear search manually.

Summary

Sorting and Searching in C++ एक ज़रूरी C++ topic है। परिभाषा सीखें, syntax समझें, example program चलाएं और फिर practice tasks हल करके concept मज़बूत करें।