C++ Primer Plus

Passing and Returning Structures

Passing structures by value makes the most sense when the structure is relatively compact, so let’s look at a couple examples along those lines. The first example deals with travel time (not to be confused with time travel). Some maps will tell you that it is 3 hours, 50 minutes, from Thunder Falls to Bingo City and 1 hour, 25 minutes, from Bingo City to Grotesquo. You can use a structure to represent such times, using one member for the hour value and a second member for the minute value. Adding two times is a little tricky because you might have to transfer some of the minutes to the hours part. For example, the two preceding times sum to 4 hours, 75 minutes, which should be converted to 5 hours, 15 minutes. ...