Control Structure in C++ Programming

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Control Structure in C++ Programming

Control Structure គឺជាការបញ្ជាការប្រតិបត្តិកម្មវិធី (Program Flow) ក្នុង C++ ដើម្បីសម្រេចចិត្ត ឬធ្វើការងារដដែលៗ។

Table of Contents 1. Introduction 2. If Statement 3. If Else 4. Switch Case 5. Loop (for, while) 6. Project Practice

1. Introduction to Control Structure

Control Structure មាន 3 ប្រភេទសំខាន់៖

• Sequential Structure
• Selection Structure
• Loop Structure

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2. If Statement

ប្រើសម្រាប់ពិនិត្យលក្ខខណ្ឌ។

#include <iostream>

using namespace std;

int main(){

int age;

cout<<"Enter age: ";
cin>>age;

if(age >= 18)
cout<<"You are adult";

}

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3. If Else Statement

#include <iostream>

using namespace std;

int main(){

int number;

cout<<"Enter number:";
cin>>number;

if(number % 2 == 0)
cout<<"Even Number";

else
cout<<"Odd Number";

}

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4. Switch Case

#include <iostream>

using namespace std;

int main(){

int day;

cout<<"Enter day number:";
cin>>day;

switch(day){

case 1:
cout<<"Monday";
break;

case 2:
cout<<"Tuesday";
break;

default:
cout<<"Invalid Day";

}

}

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5. Loop Structure

Loop ប្រើសម្រាប់ធ្វើការងារដដែលៗ។

For Loop Example

#include <iostream>

using namespace std;

int main(){

for(int i=1;i<=5;i++)
cout<

While Loop Example

#include <iostream>

using namespace std;

int main(){

int i=1;

while(i<=5){

cout<

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6. Project Practice – Student Grade System


Create program to calculate student grade using Control Structure.


#include <iostream>

using namespace std;

int main(){

int score;

cout<<"Enter Score:";
cin>>score;

if(score >= 90)
cout<<"Grade A";

else if(score >= 80)
cout<<"Grade B";

else if(score >= 70)
cout<<"Grade C";

else if(score >= 60)
cout<<"Grade D";

else
cout<<"Fail";

}


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Control Structure Summary




Type
Example



Selection
If, If Else, Switch



Loop
For, While, Do While



Sequential
Program runs step by step

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