CODEWITHSUNDEEP
c++setw
ChrisTov0803
ChrisTov0803

Reputation: 27

How to format right and left justification on the same line?

If I am making a data table to show the results of several functions, how can I use the setw(), left, and right keywords to create a table which is formatted like this:

Height                       8
Width                        2
Total Area                  16
Total Perimeter             20

Notice how the overall "width" of the table is constant (about 20 spaces). But the elements on the left are left justified and the values on the right are right justified.

Upvotes: 1

Views: 2196

Answers (2)

jignatius
jignatius

Reputation: 6474

#include <iostream>
#include <string>
#include <vector>
#include <iomanip>

struct Result
{
    std::string Name;
    int Value;
};

int main()
{    
    std::vector<Result> results = { {"Height", 8}, {"Width", 2}, {"Total Area", 16}, {"Total Perimeter", 20} };

    for (auto result : results)
    {
        std::cout << std::setw(16) << std::left << result.Name;
        std::cout << std::setw(4) << std::right << result.Value << std::endl;
    }

    return 0;
}

Upvotes: 1

Andreas DM
Andreas DM

Reputation: 10998

You could do something like this:

// "Total Perimiter" is the longest string
// and has length 15, we use that with setw
cout << setw(15) << left << "Height"          << setw(20) << right << "8"  << '\n';
cout << setw(15) << left << "Width"           << setw(20) << right << "2"  << '\n';
cout << setw(15) << left << "Total Area"      << setw(20) << right << "16" << '\n';
cout << setw(15) << left << "Total Perimeter" << setw(20) << right << "20" << '\n';

Upvotes: 0

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