Chapter 5 Exercise Set 1: CPE PracticeΒΆ

  1. What is the output of the following program?

    #include <iostream>
using namespace std;

int main() {
  bool ints = sizeof(long) >= sizeof(int) && sizeof(int) >= sizeof(short);
  bool floats = sizeof(float) == 0.5 * sizeof(double);
  bool chars = sizeof(char) == 1;
  int v = ints && floats && chars;
  cout << v << endl;

  return 0;
}

    1. True

    2. False

    3. 1

    4. 0

  2. What is the output of the following program?

    #include <iostream>
using namespace std;

int f() {
    return 1;
}

int f(int n) {
    return n + 1;
}

int f(int n, int m) {
    return n + m + 1;
}

int main() {
    cout << f() + f(0) + f(3, 4) << endl;
    return 0;
}

  3. What is the output of the following program?

    #include <iostream>
using namespace std;

int f() {
    return 1;
}

int f(int n) {
    return n % 2 == 0 ? 1 : 0;
}

int f(int n, int m) {
    return n > m ? n - m : m - n;
}

int main() {
    cout << f() + f(11) + f(3, 4) << endl;
    return 0;
}

  4. What is the output of the following program?

    #include <iostream>
using namespace std;

int f(int a) {
    int b = 0;
    int c = 5;
    int total = 0;
    while (--c)
        total += b;
    return total - a;
}

int f(int a, int b) {
    int c = 5;
    int total = 0;
    while (--c)
        total += b;
    return total - a;
}

int f(int a, int b, int c) {
    int total = 0;
    while (--c)
        total += b;
    return total - a;
}

int main() {
    cout << f(3, 1, 2) << f(5, 2) << f(0) << endl;
    return 0;
}

  5. What is the output of the following program?

    #include <iostream>
using namespace std;

int f(char x, float y) {
    return 2 * x + y;
}

int f(float x, char y) {
    return x - y;  
}

int f(int a, int b, int c) {
    int total = 0;
    while (--c)
        total += b;
    return total - a;
}

int main() {
    char c1 = 3;
    char c2 = 5;
    cout << f(1, 4, 2) << f(c2, 2.0) << f(4.0, c1) << endl;
    return 0;
}

  6. What is the output of the following program?

    #include <iostream>
using namespace std;

int f(char x) {
    return x * x;
}

int f(double g) {
    return int(g);
}

int f(int a, int b, int c) {
    int total = 0;
    while (--c)
        total += b;
    return total - a;
}

int f(double a, int b, char c) {
    return int(a + b + c);
}

int main() {
    char ch = 3;
    cout << f(2, 3, 4) << f(3.0, 1, ch) << f(1.0) << f(ch) << endl;
    return 0;
}

  7. What is the output of the following program?

    #include <iostream>
using namespace std;

int main() {
    int i = 12;
    float f = 1000.0;
    while (i > 0) {
        i -= 3;
        f /= 10;
    }
    cout << f << endl;
    return 0;
}

  8. What is the output of the following program?

    #include <iostream>
using namespace std;

int main() {
    int i = 12;
    float f = -1.0;
    while (i < 0) {
        f = f + 5.0 * f / -5; 
        --i;
    }
    cout << i << endl;
    return 0;
}

  9. What is the output of the following program?

    #include <iostream>
using namespace std;

int f() {
    return 1;
}

int f(int n) {
    return n % 2 == 0 ? 1 : 0;
}

int f(int n, int m) {
    return n > m ? n - m : m - n;
}

int main() {
    cout << f() + f(11) + f(3, 4) << endl;
    return 0;
}

  10. What is the output of the following program? (Note: Watch our for the >>=, which is not a comparison operator, but a compound assignment operator.)

    #include <iostream>
using namespace std;

int doit(int n, int t = 2) {
    int x = n;
    while (t >>= 1)
        x++;
    return x;
}

int main() {
    cout << doit(2, 4) << doit(6) << endl;
    return 0;
}

  11. What is the output of the following program?

    #include <iostream>
using namespace std;

int main() {
    int a, b = 2 | 5;
    for (a = 0; a < 3; a += 2)
        b++;
    cout << b << endl;
    return 0;
}

  12. What is the output of the following program?

    #include <iostream>
using namespace std;

int main() {
    int n = 0, m = 7 ^ 5;
    while (n == 0) {
        if (m > 1)
            n = m;
        ++m;
    }
    cout << n << m << endl;
    return 0;
}

  13. What is the output of the following program?

    #include <iostream>
using namespace std;

int main() {
    for (float val = -10.0; val < 100.0; val = -val * 2) {
        if (val < 0 && -val >= 40)
            break;
        cout << '*'; 
    }
    cout << endl;

    return 0;
}

  14. What is the output of the following program?

    #include <iostream>
using namespace std;

int main() {
    float v = 500.0;
    do {
        v /= 5;
        cout << '*';
    } while (v > 1.0);
    cout << endl;

    return 0;
}

  15. What is the output of the following program?

    #include <iostream>
using namespace std;

int main() {
    int u = 2, v = 1;
    do {
        u--;
        v++;
    } while (u >= 0);
    cout << u << '&' << v << endl;

    return 0;
}

  16. What is the output of the following program?

    #include <iostream>
using namespace std;

int main() {
    char ch = 'd';
    for (float f = -4.0; f < 100; f *= -2)
        cout << ++ch;
    cout << endl;

    return 0;
}

  17. What is the output of the following program?

    #include <iostream>
using namespace std;

int main() {
    int a = 3, b = 1;

    while (a > 0) {
        a--;
        b++;
    }

    cout << a << ' ' << b << endl; 

    return 0;
}

  18. What is the output of the following program?

    #include <iostream>
using namespace std;

int main() {
    for (float f = -4.0; f < 500; f *= -2)
        cout << '*';
    cout << endl;

    return 0;
}

  19. What is the output of the following program?

    #include <iostream>
using namespace std;

char f(char n) {
    int count = 0;
    for (n = 4 * n; n > 0; n >>= 2)
        count++;
    return count;
}

void f(int n) {
    for (char count = f(char(n)); count > 0; count--)
        cout << '*';
}

int main() {
    char x = 3;
    f(3);
    cout << endl;
    return 0;
}