Code :
#include<iostream>
#include<conio.h>
using namespace std;

int TempConvert(int);

int main() {
    int celsius, fahrenheit;
    cout<<"Enter the temperature in Celsius : ";
    cin>>celsius;
    TempConvert(celsius);
}

int TempConvert(int x) {
    int output;
    output = (( 9 * x ) / 5 ) + 32;
    cout<<"Fahrenheit value is: "<<output;
   
}

Output :
Enter the temperature in Celsius : 40
Fahrenheit value is: 104

IDE Used To Test This Code : DEV C++

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