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# Answer to Question #18473 in C++ for farouk dehbi

Question #18473
Write a program that asks the user to enter (3) digits, than displays the following menu:
a- Display the maximum
b- Display the minimum
c- Display the numbers sorted in decreasing order
d- Display odd numbers
e- Display even numbers
f- Write the numbers in a file.
The program then asks the user to enter his choice and executes the required task.
If the user enters option &lsquo;f&rsquo; ,the program will have to ask the user to enter the name of the file.
Important :
1- Use a switch to handle the different options of the menu.
2- All numbers need to be displayed with 2 decimals precision.
1
2012-11-13T10:36:20-0500
#include <iostream>
#include <fstream>
#include <string>
using namespace std;

int*bubbleSortDesc(int*arr,int len);
int arrayofnumbers[4];
void WriteToFile();
int main()
{

int number;
int count=0;
char ch;
while(cin>>number){
arrayofnumbers[count]=number;
count++;
if(count==3){
break;
}
}

int*ptrAsc=bubbleSortDesc(arrayofnumbers,count);
cout<<"
a- Display the maximum";
cout<<"
b- Display the minimum";
cout<<"
c- Display the numbers sorted in decreasing order";
cout<<"
d- Display odd numbers";
cout<<"
e- Display even numbers";
cout<<"
f- Write the numbers in a file";
cin>>ch;
int max=arrayofnumbers[0];
int min=arrayofnumbers[0];
switch(ch){
case 'a':

for(int i=0;i<count;i++){
if(arrayofnumbers[i]>max){
max=arrayofnumbers[i];
}
}
cout<<"Maximum number is "<<max;
break;
case 'b':

for(int i=0;i<count;i++){
if(arrayofnumbers[i]<=min){
min=arrayofnumbers[i];
}
}
cout<<"Minimum number is "<<min;
break;
case 'c':
for(int i=0;i<count;i++)
cout<<ptrAsc[i]<<" ";
break;
case 'd':
cout<<"Odd number: ";
for(int i=0;i<count;i++){
if(arrayofnumbers[i]%2==1){
cout<<arrayofnumbers[i]<<" ";
}
}
break;
case 'e':
cout<<"Even number: ";
for(int i=0;i<count;i++){
if(arrayofnumbers[i]%2==0){
cout<<arrayofnumbers[i]<<" ";
}
}
break;
case 'f':
WriteToFile();
break;
}
cin>>number;
return 0;
}

int*bubbleSortDesc(int*arr,int len)
{
int temp;

for(int i=0;i<len;i++)
{
for(int j=0;j<len-1;j++)
{
if(arr[j]<arr[j+1])
{
temp=arr[j];
arr[j]=arr[j+1];
arr[j+1]=temp;
}
}
}
return arr;
}

void WriteToFile(){
string name;
ofstream outFile; // Step #2 - Declare outstream file.
cout<<"Enter file name: ";
cin>>name;
outFile.open(name); // Step #3 - Open outFile.

if (outFile.fail()) // Check for file creation and return error.
{
cout << "Error opening "numbers.txt" for
output.
";

}else{
for(int i=0;i<3;i++){
outFile << arrayofnumbers[i] <<" ";
}

}
}

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