Chapter 14, Problem 7RQE

Predict the Output

7. What is the output of the following programs?

A) #include <iostream>

using namespace std;

int function(int);

int main()

{

int x = 10;

cout << function(x) << endl;

return 0;

}

int function(int num)

{

if (num <= 0)

return 0;

else

return function(num - 1) + num;

}

B) #include <iostream>

using namespace std;

void function(int);

int main()

{

int x = 10;

function(x);

return 0;

}

void function(int num)

{

if (num > 0)

{

for (int x = 0; x < num; x++)

cout << '*';

cout<< endl;

function(num - 1);

}

}

C) #include <cstdlib>

#include <string>

#include <iostream>

using namespace std:

void function(string str, int pos);

int main(int argc, char** argv)

{

string names = "Adam and Eve";

function(names, 0);

return 0;

}

void function (string str. int pos)

{

if (pos < str. length())

{

function(str, pos+1);

cout << str[pos]:

}

}