Question 1:
Write a program that will:
First, add 2 double numbers
void add1 (double n1, double n2)
//main will prompt the user to enter 2 double numbers and then pass them to add1 method. The method will calculate sum and print result
Second, add 2 integer numbers
void add2()
//main will invoke the method. The method will prompt the user to enter the 2 numbers, sum then print result
Third, add 3 double numbers
double add3 (double n1, double n2, double n3)
//main will prompt the user to enter 3 double numbers and then pass them to add3 method. The method will calculate sum and return result to main. main //will display result
Fourth, add 3 integer numbers
double add4 ()
// Main will invoke the method. The method will prompt the user to enter 3 numbers, sum then return value to main. main will display result.
Test your program using:
2.5 3.5
10 20
1.5 2.5 3.5
1 2 3