I have a program that complies and runs in both
Microsoft C++ 6.0, and my schools Dec Unix C++
complier. I opened a new project in Dev C++ make it a
console application. I added these three files to my
project pwrpro.h, pwr.cpp, runpwr.cpp The program
compiles with no errors. The problem is that this
program should read data from a file and the then
write a new file, with calculations in it. It writes a
blank file. I am wondering if I am missing something
for it to work correctly in this IDE. When i do not
put my file in.data in the directory it correctly
prints "the file is not found" in the output file.
ANY HELP WILL BE GREATLY APPRECIATED!!!!
//----------
// Specification File (pwrpro.h)
// This module provides exponentiation functions.
//----------
int PowerOfInt ( int someInt, int exp );
// PRE: Assign int (someInt) and exp > 0
// POST: Firstnum raised to the power "expon1"
//(NOTE: Large exponents may produce overflow)
float PowerOfFloat ( float someFloat, int exp );
// PRE: Assign float (someFloat) and assigned some exp
> 0
// POST: someFloat raised to the power "exp"
//(NOTE: Large exponents may produce overflow)
bool NonZeroInt (int exp);
//PRE: Take infile exp
//POST: make sure exp > 0
-----------------------------------------------
-----------------------------------------------
-----------------------------------------------
//----------
// Specification File (pwr.cxx)
// This module provides exponentiation functions.
//----------
#include <iomanip.h>
#include "pwrpro.h"
int PowerOfInt ( int someInt, int exp )
//...........
// PRE: Assign int (someInt) and exp > 0
// POST: Firstnum raised to the power "expon1"
//(NOTE: Large exponents may produce overflow)
//...........
{
int i;
int partialVal = 1;
for ( i = 1; i <= exp; i++)
partialVal *= someInt;
return partialVal;
}
float PowerOfFloat (float someFloat, int exp )
//...........
// PRE: Assign float (someFloat) and assigned some exp
> 0
// POST: someFloat raised to the power "exp"
//(NOTE: Large exponents may produce overflow)
//...........
{
int i;
float partialVal = 1.0;
for ( i = 1; i <= exp; i++)
partialVal *= someFloat;
return partialVal;
}
bool NonZeroInt (int exp)
//..........
//PRE: Take infile exp
//POST: make sure exp > 0
//..........
{
bool value;
if (exp <= 0) value = false;
else
value = true;
return value;
}
-------------------------------------------------
-------------------------------------------------
-------------------------------------------------
//*************************************************************************
//PURPOSE
// runpwr.cxx)
// This program reads IntNum, IntExp, FloatNum,
FloatExp from an input file and calculates
// IntNum^Int Exp and Float Num^ Float Exp.
// Note X^n denotes X raised to the nth power.
//*************************************************************************
#include <fstream.h>
#include <iomanip.h>
#include "pwrpro.h"
int main()
{
ifstream inFile;
ofstream outFile;
inFile.open("in.data", ios::nocreate );
outFile.open("out.data");
if (! inFile)
{
outFile<<" ERROR: Unable to locate file named
'in.data' "<<endl;
return 0;
}
int IntExp, FloatExp, IntNum;
float FloatNum;
inFile >> IntNum >> IntExp >> FloatNum >> FloatExp;
while (! inFile.eof() )
{
if (NonZeroInt (IntExp)== false)
outFile <<"This Function accepts only "
<<"postive integer exponents!"
<<" Your exponent is zero or negative.
";
else
{
outFile <<IntNum << "^"<< IntExp << " = " << setw (10)
<< PowerOfInt(IntNum,IntExp) <<endl;
}
if (NonZeroInt (FloatExp)== false)
outFile <<"This Function accepts only "
<<"postive integer exponents!"
<<" Your exponent is zero or negative.
";
else
{
outFile <<FloatNum << "^"<<FloatExp << " = " << setw
(10)
<<setiosflags(ios::fixed) << setprecision
(2)<<PowerOfFloat(FloatNum, FloatExp)
<<endl <<endl;
}
inFile >> IntNum >> IntExp >> FloatNum >> FloatExp;
}
inFile.close();
outFile.close();
return 0;
}
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