Trouble with code

[I Doughboy]

I am writing a simple code that is supposed to input temperatures from a .txt file, convert them to Celsius, and then output the Celsius to another .txt file. My main problem occurs in the " while (inFile >> fnum) { " portion of the code below. I am able to input the numbers from File1.txt, but when it goes to convert them, it doesn't seem to like doing division. If I take out the " (5 / 9) " portion of the conversion, it will input the number, minus the 32, and output the resulting number. When I leave the " (5 / 9) " portion in, all it does is out 0s. Any help is appreciated.

The numbers I used in the inFile.txt file are irrelevant. They just need to be 10 numbers that it can reference.

What I have so far:

 #include <iostream>
#include <fstream>

using namespace std;

int main()
{
ifstream inFile;
ofstream outFile;

int fnum;
int cnum1;
float cnum;
int x;

inFile.open("File1.txt");
if (inFile.fail()) {
cerr <<"The file was not able to open." << endl;
exit(1);
}

while (inFile >> fnum) {
//This should be something like, cnum = ((fnum - 32) * (5 / 9))
cnum = 5 / 9;[/b]
cnum1 = (fnum - 32);
x = cnum * cnum1;
cout << "Temperature = " << x << " " << endl;
}

outFile.open("File2.txt");
outFile << x << endl;

outFile << "\nThis is the end of the of the file";

inFile.close();
outFile.close();

return 0;
}

 

[amd42]

5 / 9 is an integer expression which will always result in zero. Make the 9 be a float by changing it to 9.f and you'll be good to go.

 

[I Doughboy]

Thank you!

 

[I Doughboy]

I got that to work, but now I need it to append all 10 numbers to the output file. Right now it will only wright the 10th number to the file. Would you know how to do that?