C++ Challenge #4 | Menu Driven Program in C++ (Interview Preparations)

here is the code for this





#include <iostream>

#include <stdlib.h>

using namespace std;

int obtain_marks;

int total_marks;

int percentageoutput;

void percentage(){



cout << "Enter obtain marks"<<endl;

cin >> obtain_marks;

cout << "Enter total marks"<<endl;

cin >> total_marks;



percentageoutput = obtain_marks * 100 / total_marks;

cout << "percentage is " << percentageoutput <<endl;

}





void grade(){

int percentage;

cout << "Enter your percentage"<<endl;

cin >> percentage;



if(percentage >= 90){

cout << "you got grade A+"<<endl;

}else if(percentage >= 80){

cout << "you got grade A"<<endl;

}else if(percentage >= 50){

cout << "you got grade b"<<endl;

}else if(percentage >= 33){

cout << "you are passed"<<endl;

}else{

cout << "your are failed"<<endl;

}



}



void average(){

int sum = 0;

int items[4];

int average_calculate;

cout << "Enter four items price"<<endl;

for(int i = 0; i < 4; i++){

cin >> items[i];

}

for(int i = 0; i < 4; i++){

sum += items[i];

average_calculate = sum / 4;





}

cout << "items average is " << average_calculate <<endl;





}



main(){







int choice;

char ch;

do{



cout << "Calculators"<<endl;

cout << "press 1 to calculate percentage"<<endl;

cout << "press 2 to calculate grade " <<endl;

cout << "press 3 to calculate average" <<endl;

cout << "press 4 to exit" <<endl;



cout << "Enter your choice"<<endl;

cin >> choice;



switch(choice){

case 1:

percentage();

break;





case 2:

grade();

break;





case 3:

average();

break;



case 4:

exit(0);

break;





default:

cout << "invalid input" <<endl;

}



cout << "press Y or y to continue"<<endl;

cin >> ch;



}while(ch == 'Y' || ch == 'y');



}