Question

Output each floating-point value with two digits after the decimal point, which can be achieved by executing cout << fixed << setprecision(2); once before all other cout statements. (1) Prompt the user to enter five numbers, being five people's weights. Store the numbers in a vector of doubles. Output the vector's numbers on one line, each number followed by one space. (2 pts)

Answer 1

Answer:

In C++:

#include <iomanip>

#include <iostream>

#include <vector>

using namespace std;

int main(){

vector<double> myvector;

double userinput;

cout<<"Enter 5 numbers: ";

for (int i = 1; i <= 5; i++){

 cin>>userinput;

    myvector.push_back(userinput);

}

for (int i = 0; i < 5; i++){

    cout << fixed << setprecision(2)<< myvector.at(i) <<' ';

}

return 0;

}

Explanation:

This declares the vector as double

 vector<double> myvector;

This declares a variable for input as double

double userinput;

This prompts the user for input of 5 numbers

cout<<"Enter 5 numbers: ";

This iterates from 1 to 5

for (int i = 1; i <= 5; i++){

This gets each integer input

 cin>>userinput;

This pushes each input into the vector

    myvector.push_back(userinput); }

This iterates through the vector

for (int i = 0; i < 5; i++){

This prints each vector element separated by space using fixed setprecision

cout << fixed << setprecision(2)<< myvector.at(i) <<' ';

}