[Dev-C++] HELP---Read/Write Files in Dev C++

[Julian E. <j_e...@ya...>]

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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