Description
- Evaluate the following expressions:
Give the (i) function header; (ii) function prototype (without parameter names), for each of the following functions:
- Function hypotenuse that takes two double-precision, floating-point arguments, side1 and side2 , and returns a double-precision, floating-point result.
- Function smallest that takes three integers, x , y and z , and returns an integer.
- Function instructions that does not receive any arguments and does not return a [Note: Such functions are commonly used to display instructions to a user.]
- Function intToDouble that takes an integer argument, number , and returns a double-precision, floating-point result.
Example solution for (a):
- double hypotenuse( double side1, double side2 )
- double hypotenuse( double, double );
- Define a function hypotenuse that calculates the length of the hypotenuse of a right triangle when the other two sides are given. Use this function in a program to determine the length of the hypotenuse for each of the following triangles. The function should take two arguments of type double and return the hypotenuse as a double .
- Find the error(s) in each of the following program segments, and explain how the error(s) can be corrected:
- int g()
{ cout << “Inside function g” << endl; int h()
{ cout << “Inside function h” << endl; }
}
- int sum( int x, int y )
{ int result;
result = x + y;
}
- double square( double number )
{ double number;
return number * number;
}
- What is the output of the following program?
#include <iostream> using namespace std;
void find(int a, int &b, int &c);
Self-Review Exercise Module 5 p. 1/2 int main()
{ int one, two, three;
one = 5;
two = 10;
three = 15;
find(one, two, three);
cout << one << “, ” << two << “,” << three << endl;
find(two, one, three);
cout << one << “, ” << two << “,” << three << endl;
find(three, two, one);
cout << one << “, ” << two << “,” << three << endl;
find(two, three, one);
cout << one << “, ” << two << “,” << three << endl;
return 0;
}
void find(int a, int& b, int& c)
{ int temp;
c = a + b;
temp = a; a = b; b = 2 * temp;
}
- Consider the following program that will generate a random number between 1 and 3.
int computerChoice = rand() % 3 + 1;
Write a program that allows a user to play the Rock Paper Scissors game with computer continuously. Take a look at the following sample run.
What do you choose? [1: Rock| 2: Paper| 3: Scissors| 4: Exit]: 1
Computer: 2, User: 1
The computer won!
What do you choose? [1: Rock| 2: Paper| 3: Scissors| 4: Exit]: 2
Computer: 1, User: 2
You won!
What do you choose? [1: Rock| 2: Paper| 3: Scissors| 4: Exit]: 3
Computer: 3, User: 3
It was a tie!
What do you choose? [1: Rock| 2: Paper| 3: Scissors| 4: Exit]: 4
Self-Review Exercise Module 5 p. 2/2
