trying to debug a second program and having trouble

displays a Celsius temperature

#include
using namespace std;

//function prototypes
int getFahrenheit();
float calcCelsius(int);
int displayCelsius();

int main()
{
//declare variables
int fahrenheit = 0;
float celsius = 0.0;

//get input item
fahrenheit = getFahrenheit();

//calculate Celsius
celsius = calcCelsius(fahrenheit);

//display output item
cout << fixed;
cout << "Celsius: " << celsius << endl;
return 0;
} //end of main function

//*****program-defined functions*****

int getFahrenheit()
{
int tempF = 0;
cout << "Enter Fahrenheit temperature: ";
cin >> tempF;
return tempF;
} //end of getFahrenheit function

float calcCelsius(int tempFahrenheit)
{
float tempC = 0.0;
tempC = 5.0 / 9.0 * (tempFahrenheit - 32);
return tempC;
} //end of calcCelsius function

displayCelsius()
{
int temp;
cout << "Dipl temp: ";//display the temperture calculated from fehrenheit to celsius
return temp;//return celsius temperature
} //end of dsiplayCelsius function


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