Question

1.

Write a function named “Number” that reads in a list of numbers until the user enters 0. It will return true if the user has entered more even numbers than odd numbers; otherwise it returns false.

2.

Write a code segment to sort an array of students in ascending order of their IDs. Assume the array has been filled with names and assume the following declaration:

struct Student {

string name;

int ID;

}

Student roster[30];

// Code to fill in the student info for all students.

// Sort the roster

// your code goes here

Answer 1

1.

Source Code:

Output:

Code in text format (See above images of code for indentation):

#include<iostream>
#include<iomanip>
using namespace std;
/*main function*/
int main()
{
   /*function prototype*/
   bool Number();
   bool result;
   /*function call*/
   result=Number();
   /*print results*/
   if(result)
       cout<<"You entered more even numbers than odd numbers";
   else
       cout<<"You entered more odd numbers than even numbers";
   return 0;
}
/*function prototype*/
bool Number()
{
   /*variables*/
   int n,even=0,odd=0;
   cout<<"Enter a number or 0 to exit:"<<endl;
   while(true)
   {
       /*read number from user*/
       cin>>n;
       /*if 0 then break*/
       if(n==0)
           break;
       /*check for even or odd*/
       if(n%2==0)
           even++;
       else
           odd++;
   }
   /*return true or false based on condition*/
   if(even>odd)
       return true;
   else
       return false;
}

2.

Source Code:

Output:

Code in text format (See above images of code for indentation):

#include<iostream>
#include<iomanip>
using namespace std;
/*structure declaration*/
struct Student
{
   /*members*/
   string name;
   int ID;
};
/*array of structures*/
Student roster[30];
/*main function*/
int main()
{
   /*variables*/
   int n,i,j;
   /*read number of students from the user*/
   cout<<"Enter number of students: ";
   cin>>n;
   /*read students data*/
   for(i=0;i<n;i++)
   {
       /*read student ID*/
       cout<<"Enter student "<<i+1<<" ID:";
       cin>>roster[i].ID;
       cin.get();
       /*read student Name*/
       cout<<"Enter student "<<i+1<<" Name: ";
       getline(cin,roster[i].name);
   }
   /*sort the roster array*/
   for(i=0;i<n-1;i++)
   {
       for(j=0;j<n-i-1;j++)
       {
           if(roster[j].ID>roster[j+1].ID)
           {
               /*swapping of ID's*/
               int temp=roster[j].ID;
               roster[j].ID=roster[j+1].ID;
               roster[j+1].ID=temp;
               /*swapping of Names*/
               string sn=roster[j].name;
               roster[j].name=roster[j+1].name;
               roster[j+1].name=sn;
           }
       }
       /*print id and names*/
       cout<<"ID\tName"<<endl;
       cout<<"-----------------------------"<<endl;
       for(i=0;i<n;i++)
       {
           cout<<roster[i].ID<<"\t"<<roster[i].name<<endl;
       }
   }
   return 0;
}