Answer to Question #296762 in C++ for Shan

Question

Qno1: Write a program that helps to find factorial,

percentage, average, Min Number, Max Number, and sort

the array in ascending and descending order. User select

the option what operation he/she wants to perform and

then enter data according to requirement.

Perform all things by using functions.

Answer 1

#include <iostream>
using namespace std;




void findFactorial(){
	int n;
	long double factorial = 1.0;


	cout << "Enter a positive integer: ";
	cin >> n;


	if (n < 0)
		cout << "Error! Factorial of a negative number doesn't exist.";
	else {
		for(int i = 1; i <= n; ++i) {
			factorial *= i;
		}
		cout << "Factorial of " << n << " = " << factorial<<"\n\n";    
	}


}
void findPercentage(){
	float number;
	float percentage;
	cout<<"Enter the number: ";
	cin>>number;
	cout<<"Enter the percentage: ";
	cin>>percentage;
	float percentageNumber= (number * percentage) / 100.0;
	cout<<"Percentage: "<<percentageNumber<<"\n\n";
}


void findAverageArray(float numbers[],int size){
	float sum=0;
	for(int i=0;i<size;i++){
		sum+=numbers[i];
	}
	float average=sum/(float)size;
	cout<<"Average of the array: "<<average<<"\n\n";
}


void findMinNumberArray(float numbers[],int size){
	float min=numbers[0];
	for(int i=0;i<size;i++){
		if(numbers[i]<min){
			min=numbers[i];
		}
	}
	cout<<"Min number of the array: "<<min<<"\n\n";
}
void findMaxNumberArray(float numbers[],int size){
	float max=numbers[0];
	for(int i=0;i<size;i++){
		if(numbers[i]>max){
			max=numbers[i];
		}
	}
	cout<<"Max number of the array: "<<max<<"\n\n";
}
// print array
void printArray(float numbers[], int size) {
	for (int i = 0; i < size; ++i) {
		cout << "  " << numbers[i];
	}
	cout << "\n\n";
}
void sortArrayInAscendingOrder(float numbers[],int size){
	for(int i=0; i<(size-1); i++)
	{
		for(int j=0; j<(size-i-1); j++)
		{
			if(numbers[j]>numbers[j+1])
			{
				float temp = numbers[j];
				numbers[j] = numbers[j+1];
				numbers[j+1] = temp;
			}
		}
	}
	cout<<"\nThe array in ascending order:\n";
	printArray(numbers,size);
}


void sortArrayInDescendingOrder(float numbers[],int size){
	for(int i=0; i<(size-1); i++)
	{
		for(int j=0; j<(size-i-1); j++)
		{
			if(numbers[j]<numbers[j+1])
			{
				float temp = numbers[j];
				numbers[j] = numbers[j+1];
				numbers[j+1] = temp;
			}
		}
	}
	cout<<"\nThe array in descending order:\n";
	printArray(numbers,size);
}






int main(){
	float numbers[1000];
	int size;
	int option;
	cout<<"Enter the size of array: ";
	cin>>size;
	for(int i=0;i<size;i++){
		cout<<"Ente the number "<<(i+1)<<": ";
		cin>>numbers[i];
	}


	do{
		cout<<"1. Find factorial\n";
		cout<<"2. Find percentage\n";
		cout<<"3. Find average of the array\n";
		cout<<"4. Find min number of the array\n";
		cout<<"5. Find max number of the array\n";
		cout<<"6. Sort the array in ascending order\n";
		cout<<"7. Sort the array in descending order\n";
		cout<<"8. Exit\n";
		cout<<"Select the option: ";
		cin>>option;


		if(option==1){
			findFactorial();
		}else if(option==2){
			findPercentage();
		}else if(option==3){
			findAverageArray(numbers, size);
		}else if(option==4){
			findMinNumberArray(numbers, size);
		}else if(option==5){
			findMaxNumberArray(numbers, size);
		}else if(option==6){
			sortArrayInAscendingOrder(numbers, size);
		}else if(option==7){
			sortArrayInDescendingOrder(numbers, size);
		}else if(option==8){
			//exit
		}else{
			cout<<"\nWrong menu item\n\n";
		}
	}while(option!=8);


	system("pause");
	return 0;
}