Če želite razumeti ta primer, morate poznati naslednje programske teme C ++:
- Strukture C ++
- Struktura in funkcija C ++
- Kazalci na strukturo C ++
Primer: Program za časovno razliko
// Computes time difference of two time period // Time periods are entered by the user #include using namespace std; struct TIME ( int seconds; int minutes; int hours; ); void computeTimeDifference(struct TIME, struct TIME, struct TIME *); int main() ( struct TIME t1, t2, difference; cout << "Enter start time." << endl; cout <> t1.hours>> t1.minutes>> t1.seconds; cout << "Enter stop time." << endl; cout <> t2.hours>> t2.minutes>> t2.seconds; computeTimeDifference(t1, t2, &difference); cout << endl << "TIME DIFFERENCE: " << t1.hours << ":" << t1.minutes << ":" << t1.seconds; cout << " - " << t2.hours << ":" << t2.minutes << ":" << t2.seconds; cout << " = " << difference.hours << ":" << difference.minutes << ":" < t1.seconds) ( --t1.minutes; t1.seconds += 60; ) difference->seconds = t1.seconds - t2.seconds; if(t2.minutes> t1.minutes) ( --t1.hours; t1.minutes += 60; ) difference->minutes = t1.minutes-t2.minutes; difference->hours = t1.hours-t2.hours; )
Izhod
Vnesite ure, minute in sekunde: 11 33 52 Vnesite čas ustavitve. Vnesite ure, minute in sekunde: 8 12 15 ČASOVNA RAZLIKA: 11:33:52 - 8:12:15 = 3:21:37
V tem programu je uporabnik pozvan, da vnese dve časovni obdobji in ti dve obdobji sta shranjeni v strukturnih spremenljivkah t1 oziroma t2.
Nato computeTimeDifference()funkcija izračuna razliko med časovnimi obdobji in rezultat se prikaže na zaslonu iz main()funkcije, ne da bi jo vrnila (klic po referenci).
