Question

Write a program that uses a vector to store a set of integers. The program outputs the smallest, largest, and average of the numbers. When declaring the numbers do not specify its size. Use the function push_back to insert elements into the array. You will have to declare the size of the vector somewhere in your program.

*Note: I need help to write out this problem in C++ while using Visual Studio 2017

Answer 1

Code to copy:

//Include required header files.

// Only use stdafx.h in visual studio

#include "stdafx.h"

#include <iostream>

#include <vector>

using namespace std;

int main() {

    // Initialize vector named programVec.

    vector<int> programVec;

    // inserting integers into vetor

    programVec.push_back(20);

    programVec.push_back(30);

    programVec.push_back(40);

    programVec.push_back(50);

    programVec.push_back(60);

    // declare required varables

    int min = programVec[0], max = programVec[0], sum = 0;

    for (int i = 0; i < programVec.size(); ++i) {

        if (programVec[i] > max) max = programVec[i];

        if (programVec[i] < min) min = programVec[i];

        sum += programVec[i];

    }

    double avg = sum/(double)programVec.size();

   

    // Display required outputs.

    cout << "The smallest number is : " << min << endl;

    cout << "The largest number is : " << max << endl;

    cout << "The average is : " << avg << endl;

    cout << "The size of Vector is " << programVec.size() << endl;

    // system("pause"); can only use in visual studio.

    system("pause");

    return 0;

}