Good programming style with comments
Great style example, notice how easy it is to read.Also, the exercise we did, where you had to copy the program, showed
the proper style that you are to follow
// Filename: Assign2.CPP
//
// CS161
//
// Program to help children with simple math.
// Prompt child for two values after printing
// a title message.
#include <iostream.h> // for input/output
#include <iomanip.h> // for formatting
int main()
{
int addnum1; // first addition number
int addnum2; // second addition number
int addans; // addition answer
int her_ans; // user's answer
int subnum1; // first subtraction number
int subnum2; // second subtraction number
int subans; // subtraction answer
float multnum1; // first multiplication number
float multnum2; // second multiplication number
float multans; // multiplication answer
float divnum1; // first division number
float divnum2; // second division number
float divans; // division answer
//*************************************************************************
// Addition section
//*************************************************************************
cout << "\n\n*** Math Practice"
<< " ADDITION" // Header for Math
<< " ***\n\n\n";
cout << "What is the first number? "; // prompt for number
cin >> addnum1; // read in number
cout << "What is the second number? "; // prompt for number
cin >> addnum2; // read in number
addans = addnum1 + addnum2; // Compute answer and give
cout << "What do you think" // user a chance to think.
<< " the answer is? ";
cin >> her_ans; // Nothing is done with this
cout << "\n" << addnum1 << " plus " // Print answer and equation
<< addnum2 << " is "
<< addans << "\n\n Hope you" // and an encouraging note
<< " got it right!";
//*************************************************************************
// Subtraction section
//*************************************************************************
cout << "\n\n***********************"
<< "***************************";
cout << "\n\n*** Math Practice" // Header for Math
<< " SUBTRACTION"
<< " ***\n\n\n";
cout << "What is the first number? "; // prompt for number
cin >> subnum1; // read in number
cout << "What is the second number? "; // prompt for number
cin >> subnum2; // read in number
subans = subnum1 - subnum2; // Compute answer and give
// user a chance to think
cout << "What do you think"
<< " the answer is? ";
cin >> her_ans; // Nothing is done with her_ans
cout << "\n" << subnum1 << " minus " // Print answer and equation
<< subnum2 << " is "
<< subans << "\n\n Hope you" // and an encouraging note
<< " got it right!";
//*************************************************************************
// Multiplication section
//*************************************************************************
cout << "\n\n***********************"
<< "***************************";
cout << "\n\n***"
<< "Math Practice MULTIPLICATION" // Header for Math
<< " ***\n\n\n";
cout << "What is the first number? "; // prompt for number
cin >> multnum1; // read in number
cout << "What is the second number? "; // prompt for number
cin >> multnum2; // read in number
multans = multnum1 * multnum2; // Compute answer and give
cout << "What do you think" // user a chance to think.
<< " the answer is? ";
cin >> her_ans; // Nothing is done with this
cout << "\n" << multnum1 << " times " // Print answer and equation
<< multnum2 << " is "
<< multans << "\n\n Hope you" // and an encouraging note
<< " got it right!";
//*************************************************************************
// Division section
//*************************************************************************
cout << "\n\n***********************"
<< "***************************";
cout << "\n\n***"
<< "Math Practice DIVISION" // Header for Math
<< " ***\n\n\n";
cout << "What is the first number? "; // prompt for number
cin >> divnum1; // read in number
cout << "What is the second number? "; // prompt for number
cin >> divnum2; // read in number
divans = divnum1 / divnum2; // Compute answer and give
cout << "What do you think" // user a chance to think.
<< " the answer is? ";
cin >> her_ans; // Nothing is done with this
cout << "\n" << divnum1
<< " divided by " // Print answer and equation
<< divnum2 << " is "
<< divans << "\n\n Hope you" // and an encouraging note
<< " got it right!" <<endl;
//*************************************************************************
// Table Format section
//*************************************************************************
cout << "____________" // Begin drawing table
<< "_____________" // Draw top of table box
<< "_____________"
<< "_____________"
<< "_____________"
<< "___________\n";
cout.setf(ios::fixed, ios::floatfield); // Set up floating point
// output format
//cout.setf(ios::showpoint); // decided not to use
// this statement
cout << "|" << setw(19) << "| " // Draw one row of vertical
<< setw(18) << "|" // lines.
<< setw(19) << "|" // Use setw() for spacing
<< setw(20)
<< setprecision(2)<< "|\n";
cout << "|" << setw(5) << addnum1 // Enter equation for
<< setw(2) << " +" // Addition
<< setw(5) << addnum2
<< setw(2) <<" = " ;
cout << " | " << setw(5) << subnum1 // Enter equation for
<< setw(2) << " - " // Subtraction
<< setw(5) << subnum2
<< setw(2) << " = ";
cout << " | " << setw(5) << multnum1 // Enter equation for
<< setw(2) << " * " // Multiplication
<< setw(5) << multnum2
<< setw(2) << " = ";
cout << " | "
<< setw(5) << divnum1 // Enter equation for
<< setw(2) << " / " // Division
<< setw(5) << divnum2
<< setw(2) << " = "
<< setw(2) << " |\n" ;
cout << "|" <<setw(10) << addans // Enter one row of vertical
<< setw(8) << "|" // lines for table
<< setw(10) << subans // with answers formatted
<< setw(9) << "|" // below the equation.
<< setprecision(2)
<< setw(10) << multans
<< setw(9) << "|"
<< setw(10) << divans
<< setw(10) << "|\n";
cout << "|_________________|"
<< "__________________|"
<< "__________________|" // Enter bottom line of
<< "__________________|\n"; // table
return 0;
}
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