Line up text output in C++ - c++

Question

So i have a program that reads from a text file and outputs to another text file. Here is the file text (format included) that it reads:
Duckey Donald 85
Goof Goofy 89
Brave Balto 93
Snow Smitn 93
Alice Wonderful 89
Samina Akthar 85
Simba Green 95
Donald Egger 90
Brown Deer 86
Johny Jackson 95
Greg Gupta 75
Samuel Happy 80
Danny Arora 80
Sleepy June 70
Amy Cheng 83
Shelly Malik 95
Chelsea Tomek 95
Angela Clodfelter 95
Allison Nields 95
Lance Norman 88
In the program it adds each of these to a struct within an array; it then calculates the grade and prints.
cout << "Student Name Test Score Grade" << endl;
for (int studentNumber = 0; studentNumber < STUDENT_NUMBER; studentNumber++){
cout << students[studentNumber].studentLName << ", "
<< students[studentNumber].studentFName << " "
<< students[studentNumber].testScore << " "
<< students[studentNumber].grade << endl;
}
The desired output looks like this:
Student Name Test Score Grade
Donald, Duckey 85 B
Goofy, Goof 89 B
Balto, Brave 93 A
Smitn, Snow 93 A
Wonderful, Alice 89 B
Akthar, Samina 85 B
Green, Simba 95 A
Egger, Donald 90 A
Deer, Brown 86 B
Jackson, Johny 95 A
Gupta, Greg 75 C
Happy, Samuel 80 B
Arora, Danny 80 B
June, Sleepy 70 C
Cheng, Amy 83 B
Malik, Shelly 95 A
Tomek, Chelsea 95 A
Clodfelter, Angela 95 A
Nields, Allison 95 A
Norman, Lance 88 B
Highest Test Score: 95
Students having the highest test score:
Green, Simba
Jackson, Johny
Malik, Shelly
Tomek, Chelsea
Clodfelter, Angela
Nields, Allison
So basically my question is this... is there any way for the test score column integers to line up like they do in my above desired output?
SOLUTION
int colWidth = 20;
for (int studentNumber = 0; studentNumber < STUDENT_NUMBER; studentNumber++){
string s = students[studentNumber].studentFName + ", " + students[studentNumber].studentLName;
int size = s.size();
cout << s << std::string(colWidth - size, ' ')
<< students[studentNumber].testScore << " "
<<

Answer 1

You can pad the string manually with spaces like so:
#include <string>
#include <iostream>
int main()
{
std::string first("John");
std::string last("Smith");
std::string full = last + ", " + first;
int colWidth = 20;
std::cout << "12345678901234567890\n"
<< full << std::string(colWidth - full.size(), ' ')
<< "aligned after 20 characters\n";
return 0;
}
Outputs:
12345678901234567890
Smith, John aligned after 20 characters
This will work for left justifying your text, given you calculate the number of characters you print.
For right-justifying, std::setw from <iomanip> works well. Unlike other stream manipulators, std::setw is not sticky, so it will only modify your next immediate output.
#include <string>
#include <iostream>
#include <iomanip>
int main()
{
std::string s("ABCDE");
int colWidth = 20;
std::cout << "12345678901234567890\n";
std::cout << std::setw(colWidth) << s << "\n";
return 0;
}
Prints
12345678901234567890
ABCDE
Putting it all together, I would left justify the first column, and right justify the second and third columns.
#include <string>
#include <iostream>
#include <iomanip>
int main()
{
std::string first("John");
std::string last("Smith");
std::string full = last + ", " + first;
int score = 100;
std::string grade("A");
std::cout << "123456789012345678901234512345\n"
<< full << std::string(20 - full.size(), ' ')
<< std::setw(5) << score
<< std::setw(5) << grade << "\n";
return 0;
}
Prints:
123456789012345678901234512345
Smith, John 100 A

Answer 2

You can change your code like this:
#include <iomanip>
cout << "Student Name Test Score Grade" << endl;
for (int studentNumber = 0; studentNumber < STUDENT_NUMBER; studentNumber++){
cout << setiosflags(ios::left) << setw(29) << setfill(' ')
<< students[studentNumber].studentLName + ", " + students[studentNumber].studentFName
<< setw(8) << students[studentNumber].testScore
<< students[studentNumber].grade << endl;
}
where 29 and 8 are calculated based on your disired output format, you can change it as you needs.