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This programming challenge is from an initial C++ programming course I took in Fall 2007. The Chapter (2) was titled “Introduction to C++”.

2.11: A car with a 20-gallon gas tank averages 21.5 miles per gallon when driven in town and 26.8 miles per gallon when driven on the highway. Write a program that calculates and displays the distance the car can travel on one tank of gas when driven in town and when driven on the highway.

Hint: The following formula can be used to calculate the distance:

Distance = Number of Gallons X Average Miles per Gallon.

My solution (using hard-coded values as per instructions):

/* Chapter 2 Challenge 11
Written by Kirk Hingsberger
September 11, 2007
Distance per Tank of Gas Challenge
*/

#include
using namespace std;

int main()
{
float gallons = 20;
float mpgTown = 21.5;
float mpgHwy = 26.8;
float distanceTown = gallons * mpgTown;
float distanceHwy = gallons * mpgHwy;

cout << "A car with a " << gallons << "-gallon gas tank earning ";
cout << mpgTown << " miles per gallon in town can travel ";
cout << distanceTown << " miles in town on a full tank." << endl;
cout << "A car with a " << gallons << "-gallon gas tank earning ";
cout << mpgHwy << " miles per gallon on Highway can travel ";
cout << distanceHwy << " Highway miles on a full tank." << endl;

return 0;
}

As with many other beginning C++ programs, we were instructed to not sweat the fact that our figures computed in scientific notation or with many decimal places. We would learn those controls later.

Here is the capture script I turned in for grading:

Script started on Thu 13 Sep 2007 10:17:23 AM MDT
$ cat chap2chlg11.cc
/* Chapter 2 Challenge 11
Written by Kirk Hingsberger
September 11, 2007
Distance per Tank of Gas Challenge
*/

#include
using namespace std;

int main()
{
float gallons = 20;
float mpgTown = 21.5;
float mpgHwy = 26.8;
float distanceTown = gallons * mpgTown;
float distanceHwy = gallons * mpgHwy;

cout << “A car with a ” << gallons << “-gallon gas tank earning “;
cout << mpgTown << ” miles per gallon in town can travel “;
cout << distanceTown << ” miles in town on a full tank.” << endl;
cout << “A car with a ” << gallons << “-gallon gas tank earning “;
cout << mpgHwy << ” miles per gallon on Highway can travel “;
cout << distanceHwy << ” Highway miles on a full tank.” << endl;

return 0;
}
$ g++ -o chap2chlg11 chap2chlg11.cc -s
$ chap2chlg11
A car with a 20-gallon gas tank earning 21.5 miles per gallon in town can travel 430 miles in town on a full tank.
A car with a 20-gallon gas tank earning 26.8 miles per gallon on Highway can travel 536 Highway miles on a full tank.
$ exit
exit

Script done on Thu 13 Sep 2007 10:17:52 AM MDT