I "miss wrote" the name of the book ... sorry ahhaha accelerated hhahah why did I write advanced ... damn =S ahha

4-2. Write a program to calculate the squares of int values up to 100. The program should

write two columns: The first lists the value; the second contains the square of that value. Use

setw (described above) to manage the output so that the values line up in columns.

PS: the program is using doubles cuz the books asks you to do so in a latter exercise

My question is ... he asks us to use setw, how can I use it in a practical way? could someone use it in this code I'm posting to exemplify it to me? thx!!

any comments or criticisms about what I did are really welcome ... =D

```
#include <algorithm>
#include <iomanip>
#include <ios>
#include <iostream>
#include <stdexcept>
#include <string>
#include <vector>
using std::cout; using std::endl;
using std::cin; using std::vector;
using std::string; using std::setw;
using std::streamsize; using std::setprecision;
int main()
{
vector<double> numbers;
vector<string> num;
cout << "Enter the values: ";
double x;
while(cin >> x){
numbers.push_back(x);
}
sort(numbers.begin(), numbers.end());
vector<double>::size_type size = numbers.size();
if(size == 0){
cout << "You must enter at least one value." << endl;
return 1;
}
cout << "The squares of the numbers you entered are:" << endl;
for(vector<double>::size_type i = 0; i != numbers.size(); ++i){
if(numbers[i] <= 100){
int amount = 0;
if(numbers[i] < 10)
amount = 3;
if(numbers[i] >= 10 && numbers[i] < 100)
amount = 2;
if(numbers[i] == 100)
amount = 1;
double square = numbers[i]*numbers[i];
string spaces(amount, ' ');
streamsize prec = cout.precision();
cout << setprecision(4) << numbers[i] << spaces
<< square << endl;
}else{
cout << numbers[i] << " The number must be under 100." << endl;
}
}
return 0;
};
```