CONTROL STRUCTURES II: REPETITION - Java Programming: From Problem Analysis to Program Design - page 302

while (num != -999) //Line 5

{ //Line 6

sum = sum + num; //Line 7

num = inFile.nextInt(); //Line 8

} //Line 9

System.out.println("Line " + (counter + 1)
+ ": Sum = " + sum); //Line 10

} //Line 11

EXAMPLE 5-22

Consider the following data:

101
Lance Smith
65 78 65 89 25 98 -999
102
Cynthia Marker
87 34 89 99 26 78 64 34 -999
103
Sheila Mann
23 99 98 97 26 78 100 63 87 23 -999
104
David Arora
62 35 78 99 12 93 19 -999
...

The number -999 at the end of a line acts as a sentinel and therefore is not part of
the data.
Assume that this data describes certain candidates seeking the student council's presidential
seat. For each candidate the data is in the following form:

ID
Name
Votes

The objective is to find the total number of votes received by each candidate.
We assume that the data is input from the file, Exp_5_22.txt , of unknown size. We also
assume that the input file has been opened using the Scanner variable inFile .
Because the input file is of an unspecified length, we use an EOF-controlled while loop.
For each candidate, the first data item is the ID of the type, say, int , on a line by itself;
the second data item is the name, which may consist of more than one word; and the
third line contains the votes received from the various departments.