السلام عليكم ورحمه الله وبركاته
انا مبتدئه قي السي بلس بلس وعندي برامج ابي شرحها بالكامل
هذي البرامج
#include <iostream>
#include <cmath>
using namespace std;
int main()
{
const double PI = 3.14159265359;
double radius; // radius of a sphere
int count = 0; // number of spheres processed
for (;;) // loop:
{
cout << "Enter radius of sphere (0 to stop): ";
cin >> radius; // get next radius
if (radius == 0) break; // terminate loop if end of data
count++; // count the data
// find the volume
double volume = 4.0 * PI * pow(radius, 3)/ 3.0;
// output the results
cout << "Volume of sphere of radius " << radius
<< " is " << volume << " cubic inches.\n\n";
} // end loop
// Output data count
cout << endl << count << " spheres processed\n";
return 0;
}
وهذا البرنامج الثاني
#include <iostream>
#include <cmath>
using namespace std;
int main()
{
const double PI = 3.14159265359;
double radius; // radius of a sphere
int count = 0; // number of spheres processed
char response; // user response to "More data?"
do
{
cout << "Enter radius of sphere: ";
cin >> radius; // get next radius
count++; // count the data
// find the volume
double volume = 4.0 * PI * pow(radius, 3)/ 3.0;
// output the results
cout << "Volume of sphere of radius " << radius
<< " is " << volume << " cubic inches.\n\n";
// query user if more data
cout << "More data (Y or N)? ";
cin >> response;
}
while (response == 'Y' || response == 'y');
// Output data count
cout << endl << count << " spheres processed\n";
}
البرنامج الثالث
#include <iostream>
#include <iomanip>
using namespace std;
// FUNCTION PROTOTYPES
void instruct();
void getEmployeeInfo(int & empNumber, int & dependents,
double & hours, double & rate, bool & done);
double grossWages(int dependents, double hours, double rate);
void computeNetPay(double grossPay, int dependents,
double & tax, double & netPay);
void printEmpInfo(int idNumber, double hours, double grossPay,
double taxes, double netPay);
void main()
{
int idNumber, // employee's id-number
numDependents; // number of dependents
double hoursWorked, // hours worked for this pay period
hourlyRate, // dollars per hour
grossPay, // gross pay (before taxes)
taxWithheld, // amount of tax withheld
netPay; // grossPay - taxWithheld
bool endOfData; // signals end of data
instruct();
for (;;)
{
getEmployeeInfo(idNumber, numDependents,
hoursWorked, hourlyRate, endOfData);
if (endOfData) break;
grossPay = grossWages(numDependents, hoursWorked, hourlyRate);
computeNetPay(grossPay, numDependents, taxWithheld, netPay);
printEmpInfo(idNumber, hoursWorked, grossPay, taxWithheld, netPay);
}
}
// FUNCTION DEFINITIONS
// If these were placed before main(), the prototypes could be
// omitted. This is not usually done, however.
void instruct()
/*-------------------------------------------------------------------------
Display instructions to the user.
Output: Instructions
-------------------------------------------------------------------------*/
{
cout
<< "This program computes gross pay, tax withheld, and net pay for "
<< "employees.\nWhen prompted, enter employee's id-number (enter "
<< "0 to stop). Then enter:"
<< "\n\t# of dependents hours worked hourly rate:"
<< "\nseparated by spaces.\n";
}
void getEmployeeInfo(int & empNumber, int & dependents,
double & hours, double & rate, bool & finis)
/*-------------------------------------------------------------------------
Get employee information and/or signal there is no more.
Input: Id-number, # of dependents, hours worked, and hourly rate
Pass back: The four input values (via parameters)
done is true if end of data was signaled, false otherwise
-------------------------------------------------------------------------*/
{
cout << "\nEnter employee number (0 to stop): ";
cin >> empNumber; // get employee number
finis = (empNumber == 0);
if (finis) return; // if end of data, return
// else get other info
cout << "Enter # of dependents, hours worked, and hourly rate for "
<< empNumber << ": ";
cin >> dependents >> hours >> rate;
}
double grossWages(int dependents, double hours, double rate)
/*-------------------------------------------------------------------------
Compute gross wages as determined by number of hours employee worked
plus a dependency allowance for each dependent.
Receive: Number of dependents, hours worked, hourly rate
Return: Gross wages
-------------------------------------------------------------------------*/
{
const double DEP_ALLOWANCE = 100; // bonus per dependent
double wages; // wages earned
if (hours <= 40) // no overtime
wages = hours * rate;
else // overtime
wages = 40 * rate + 1.5 * rate * (hours - 40);
// return wages + allowance for deps
return wages + DEP_ALLOWANCE * dependents;
}
void computeNetPay(double grossPay, int dependents,
double & tax, double & netPay)
/*-------------------------------------------------------------------------
Compute taxes withheld and net pay as gross pay minus taxes withheld.
Receive: Gross pay and number of dependents
Return: Taxes withheld and net pay (via parameters)
-------------------------------------------------------------------------*/
{
const double
DEDUCTION = 25.00, // deduction per dependent
TAX_RATE = 0.12; // withholding rate
tax = TAX_RATE * (grossPay - DEDUCTION * dependents);
if (tax < 0) // check if any tax to be withheld
tax = 0;
netPay = grossPay - tax; // compute net pay
}
void printEmpInfo(int idNumber, double hours, double grossPay,
double taxes, double netPay)
/*-------------------------------------------------------------------------
Display employee information
Receive: Employee's id number, hours worked, gross pay, taxes withheld,
and net pay
Output: These values with appropriate labels.
-------------------------------------------------------------------------*/
{
cout << setprecision(2) << setiosflags(ios::showpoint | ios::fixed)
<< "Employee " << idNumber << ":\n"
<< "\tHours worked: " << setw(6) << hours << endl
<< "\tGross Pay: $" << setw(6) << grossPay << endl
<< "\tTaxes withheld: $" << setw(6) << taxes << endl
<< "\tNet Pay: $" << setw(6) << netPay << endl;
}
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