demostruct2.cpp

Code

/*
 *   demostruct2.cpp
 *   demonstration usage of struct
 *     - nested structs
 *     - an array of structs
 *   CIS 250
 *   David Klick
 *   2005-01-24
 *
 */

#include <cstring>
#include <iostream>
#include <iomanip>
using std::strcpy;

struct date {
    int month;
    int day;
    int year;
};

struct emptype {
    char lastname[15];
    unsigned long id;
    double rate;
    date hiredate;
};

void printemp(emptype e);
void setfields(emptype&, char*,
    unsigned long, double, int, int, int);

int main(void) {
    emptype emp[5];

    // set members of emp array
    setfields(emp[0], "Smithson", 1786, 32.00, 3, 3, 1996);
    setfields(emp[1], "Guimond", 3654, 17.95, 4, 2, 2004);
    setfields(emp[2], "Crenshaw", 9812, 14.00, 11, 1, 2000);
    setfields(emp[3], "Lovitz", 17543, 27.25, 7, 10, 1999);

    // use assignment operator to set last array element
    emp[4] = emp[0];

    // display all the array elements
    for (int i=0; i<5; i++) {
        printemp(emp[i]);
    }
    return 0;
}

void printemp(emptype e) {
    using std::cout;
    using std::endl;
    using std::setw;
    using std::setfill;
    using std::showpoint;
    using std::setprecision;
    using std::setiosflags;
    using std::ios;
    using std::fixed;

    cout << setw(15) << e.lastname << "  ID=" << setfill('0')
        << setiosflags(ios::fixed | ios::scientific)
        << setprecision(6) << setw(6) << e.id << setfill(' ')
        << "  rate=$" << setw(6) << fixed << showpoint
        << setprecision(2) << e.rate << "  hired=" << setw(2)
        << setfill('0') << e.hiredate.month << "/" << setw(2)
        << e.hiredate.day << '/' << setw(2)
        << (e.hiredate.year % 100) << setfill(' ') << endl;
}

void setfields(emptype& e, char* nm,
    unsigned long id, double hrate, int m,
    int d, int y) {

    strcpy(e.lastname, nm);
    e.id = id;
    e.rate = hrate;
    e.hiredate.month = m;
    e.hiredate.day = d;
    e.hiredate.year = y;
}

/*
    Sample output:

       Smithson  ID=001786  rate=$ 32.00  hired=03/03/96
        Guimond  ID=003654  rate=$ 17.95  hired=04/02/04
       Crenshaw  ID=009812  rate=$ 14.00  hired=11/01/00
         Lovitz  ID=017543  rate=$ 27.25  hired=07/10/99
       Smithson  ID=001786  rate=$ 32.00  hired=03/03/96
*/