Chapter 3

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Chapter 3

Function Basics

This activity contains 10 questions.

To access functions such as abs, rand, or exit, what should be added to the top of the program?

#include <stdlib.h>#include <cmath> using namespace std;#include <iostream> using namespace std;#include <cstdlib> using namespace std;

How could we simulate rolling two six sided dice, adding their values together to produce a result from 2-12?

sum = (rand() % 11) + 2;sum = rand() % 6 + rand() % 6;sum = (rand() % 6 + rand() % 6) + 2;sum = (rand() % 5) + rand() %5) + 2;

What does the return type of void refer to?

That the function returns a string.That the function does not return any value.That the function can return any value.That the function can return a numeric value.

Which of the following functions correctly returns the minimum of three integers passed in?

int min(int num1, int num2, int num3)
{
   if (num1<num2) return num1;
   if (num2<num3) return num2;
   return num3;
}

void min(int num1, int num2, int num3)
{
   int m=num1;
   if (m > num2) m = num2;
   if (m > num3) m = num3;
   return m;
}

int min(int num1, int num2, int num3)
{
   int m=num1;
   if (m < num2) m = num2;
   if (m < num3) m = num3;
   return m;
}

int min(int num1, int num2, int num3)
{
   int m=num1;
   if (m > num2) m = num2;
   if (m > num3) m = num3;
   return m;
}

What will the following output?

void foo(int x, int y);

int main()
{
  int x=1, y=2;
  foo(y, x);
  return 0;
}

void foo(int x, int y)
{
   cout << "X = " << x << "  Y = " << y << endl;
   return;
}

X = 2 Y = 1X =1 Y = 1X =2 Y = 2X = 1 Y = 2

Which of the following function prototypes is equivalent to the following prototype? int min(int num1, int num2, int num3);

int min(long num1, long num2, long num3);long min(int, int, int);int min(int, int, int);int min(double num1, double num2, double num3);

What will the following output?

void foo();

int main()
{
  int x=1;
  cout << "Before foo, X=" << x;
  foo();
  cout << "  After foo, X=" << x;
  return 0;
}

void foo()
{
   int x = 2;
   cout << "In foo, X = " << x;
   return;
}

Before foo, X=1 In foo, X=2, After foo, X=1Before foo, X=2 In foo, X=2, After foo, X=2Before foo, X=1 In foo, X=1, After foo, X=1Before foo, X=1 In foo, X=2, After foo, X=2

What will the following output?

void foo();
int x;

int main()
{
  x=1;
  cout << "Before foo, X=" << x;
  foo();
  cout << "  After foo, X=" << x;
  return 0;
}

void foo()
{
   x = 2;
   cout << "In foo, X = " << x;
   return;
}

Before foo, X=1 In foo, X=2, After foo, X=1Before foo, X=1 In foo, X=2, After foo, X=2Before foo, X=1 In foo, X=1, After foo, X=1Before foo, X=2 In foo, X=2, After foo, X=2

What will the following code snippet output?

int x=3;
cout << x << endl;
 {
   int x=2;
   cout << x << endl;
   {
     x=1;
   }
   cout << x << endl;
 }
 cout << x << endl;
}

3 2 1 23 2 1 13 2 1 33 2 2 3

What will a modern C++ compiler output for the following code?

int i=1;
for (int i=0; i<4; i++) {
   cout << i << " ";
}
cout << i << endl;

0 1 2 3 40 1 2 3 4 10 1 2 3 30 1 2 3 1

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Chapter 3

To access functions such as abs, rand, or exit, what should be added to the top of the program?

How could we simulate rolling two six sided dice, adding their values together to produce a result from 2-12?

What does the return type of void refer to?

Which of the following functions correctly returns the minimum of three integers passed in?

What will the following output?
void foo(int x, int y); int main() { int x=1, y=2; foo(y, x); return 0; } void foo(int x, int y) { cout << "X = " << x << " Y = " << y << endl; return; }

Which of the following function prototypes is equivalent to the following prototype? int min(int num1, int num2, int num3);

What will the following output?
void foo(); int main() { int x=1; cout << "Before foo, X=" << x; foo(); cout << " After foo, X=" << x; return 0; } void foo() { int x = 2; cout << "In foo, X = " << x; return; }

What will the following output?
void foo(); int x; int main() { x=1; cout << "Before foo, X=" << x; foo(); cout << " After foo, X=" << x; return 0; } void foo() { x = 2; cout << "In foo, X = " << x; return; }

What will the following code snippet output?
int x=3; cout << x << endl; { int x=2; cout << x << endl; { x=1; } cout << x << endl; } cout << x << endl; }

What will a modern C++ compiler output for the following code?
int i=1; for (int i=0; i<4; i++) { cout << i << " "; } cout << i << endl;

Chapter 3

To access functions such as abs, rand, or exit, what should be added to the top of the program?

How could we simulate rolling two six sided dice, adding their values together to produce a result from 2-12?

What does the return type of void refer to?

Which of the following functions correctly returns the minimum of three integers passed in?

What will the following output? void foo(int x, int y); int main() { int x=1, y=2; foo(y, x); return 0; } void foo(int x, int y) { cout << "X = " << x << " Y = " << y << endl; return; }

Which of the following function prototypes is equivalent to the following prototype? int min(int num1, int num2, int num3);

What will the following output? void foo(); int main() { int x=1; cout << "Before foo, X=" << x; foo(); cout << " After foo, X=" << x; return 0; } void foo() { int x = 2; cout << "In foo, X = " << x; return; }

What will the following output? void foo(); int x; int main() { x=1; cout << "Before foo, X=" << x; foo(); cout << " After foo, X=" << x; return 0; } void foo() { x = 2; cout << "In foo, X = " << x; return; }

What will the following code snippet output? int x=3; cout << x << endl; { int x=2; cout << x << endl; { x=1; } cout << x << endl; } cout << x << endl; }

What will a modern C++ compiler output for the following code? int i=1; for (int i=0; i<4; i++) { cout << i << " "; } cout << i << endl;

What will the following output?
void foo(int x, int y); int main() { int x=1, y=2; foo(y, x); return 0; } void foo(int x, int y) { cout << "X = " << x << " Y = " << y << endl; return; }

What will the following output?
void foo(); int main() { int x=1; cout << "Before foo, X=" << x; foo(); cout << " After foo, X=" << x; return 0; } void foo() { int x = 2; cout << "In foo, X = " << x; return; }

What will the following output?
void foo(); int x; int main() { x=1; cout << "Before foo, X=" << x; foo(); cout << " After foo, X=" << x; return 0; } void foo() { x = 2; cout << "In foo, X = " << x; return; }

What will the following code snippet output?
int x=3; cout << x << endl; { int x=2; cout << x << endl; { x=1; } cout << x << endl; } cout << x << endl; }

What will a modern C++ compiler output for the following code?
int i=1; for (int i=0; i<4; i++) { cout << i << " "; } cout << i << endl;