$//$ This program displays a table of July rainfall totals for several

$//$ American cities. It calls a function to read the data from a file

$//$ one line at a time. The data values are stored in reference

$//$ parameters so they can be seen and used by the main function.

#include

#include

#include

#include

using namespace std;

$//$ Function prototype

bool readData$($ifstream &someFile, string city, double rain$)$;

int main$()$

$\{$

ifstream inputFile;

string city;

double inchesOfRain;

$//$ Display table headings

cout $<<$ "July Rainfall Totals for Selected Cities

$"$;

cout $<<"$ City Inches

$"$;

cout $<<"\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_$

$"$;

$//$ Open the data file

inputFile.open$("$weather$.$dat"$)$;

if $($inputFile$.$fail$())$

cout $<<$ "Error opening data file.

$"$;

else

$\{//$ Call the readData function

$//$ Execute the loop as long as it found and read data

while $($readData$($inputFile$,$ city, inchesOfRain$)==$ true$)$

$\{$

cout $<<$ setw$(11)<<$ left $<<$ city;

cout $<<$ fixed $<<$ showpoint $<<$ setprecision$(2)$

$<<$ inchesOfRain $<<$ endl;

$\}$

inputFile.close$()$;

$\}$

return $0$;

$\}$

$/********************************************************$

$*$ readData $*$

$*$ Each time it is called this function reads the next $*$

$*$ one line of data from the input file passed to it$.*$

$*$ It stores the input data in reference variables. $*$

$*$ Then, if it read data, it returns true. If there was $*$

$*$ no more data in the file to read, it returns false. $*$

$********************************************************/$

bool readData$($ifstream &someFile, string city, double rain$)$

$\{$

bool foundData $=$ someFile $>>$ city $>>$ rain;

return foundData;

$\}$