Answer:
The functions are as follows:
void calculateSum(double n1, double n2){
cout<<n1+n2<<endl; }
void calculateDifference(double n1, double n2){
cout<<n1-n2<<endl; }
void calculateProduct(double n1, double n2){
cout<<n1*n2<<endl; }
Call the functions in main using:
calculateSum(value1,value2);
calculateDifference(value1,value2);
calculateProduct(value1,value2);
Explanation:
This defines the calculateSum() function
void calculateSum(double n1, double n2){
This prints the sum
cout<<n1+n2<<endl; }
This defines the calculateDifference() function
void calculateDifference(double n1, double n2){
This prints the difference
cout<<n1-n2<<endl; }
This defines the calculateProduct() function
void calculateProduct(double n1, double n2){
This prints the product
cout<<n1*n2<<endl; }
This calls each of the function
calculateSum(value1,value2);
calculateDifference(value1,value2);
calculateProduct(value1,value2);
See attachment for complete program