Chapter 2 - Question 1
Write programs to convert imperial units to metric for each of the following pairs:
- inches to centimetres
- feet to metres
- miles to kilometres
- ounces to grams
- pounds to kilograms
Input is to be a number representing a quantity in the imperial unit given by the program; output is to be equivilant amount and the metric unit involved.
Solution 1
I decided to use C++ for this solution so that I could learn more about that language. This is the first C++ application that I've written that does something useful, so the code is probably terrible!
The questions asks for "programs" but I've done it as one program so I could learn about arrays.
#include <stdio.h> int main(int argc, char *argv[]){ bool bExit = false; char *cFrom[] = { "inches", "feet", "miles", "ounces", "pounds" }; char *cTo[] = { "centimetres", "metres", "kilometers", "grams", "kilograms" }; float fRatio[] = { 2.54, 0.3048, 1.609344, 28.3495231, 0.45359237 }; int iType; float fAmount; while (!bExit) { for (int n = 0; n < 5; n++) printf(" %d. Convert %s to %s\n", n+1, cFrom[n], cTo[n]); printf("\nType a number from 1 to 5 or anything else to exit.\n>"); scanf("%d", &iType); if (iType >= 1 && iType <= 5) { printf("\nHow many %s?\n>", cFrom[iType-1]); scanf("%f", &fAmount); printf("\n%g %s is %g %s.\n\n- - -\n\n", fAmount, cFrom[iType-1], fAmount * fRatio[iType-1], cTo[iType-1]); } else bExit = true; } return 0;}Example output:
Log
- Apr 23, 2005 - Added solution 1.