C Language - Chapter 5

¡Supera tus tareas y exámenes ahora con Quizwiz!

What will be displayed by the call print('*', 4) based on the implementation of the following method? void print(char symbol, int num) { while(num > 0) { printf("%c\n", symbol); num--; } }

* * * *

What is the output of the following code? #include <stdio.h> int mystery(int x, int y) { return x * y; } double mystery(double x, double y) { return x - y; } int main() { float m = 3; double n = 4; printf("%.1lf", mystery(m, n)); }

-1.0

What's the value of fib(3) based on the following code segment? long fib(long n) { if (n < 1) { return n; } else { long fib1 = fib(n - 1); long fib2 = fib(n - 2); return fib1 + fib2; } }

-2

What is the output of the following program? void getMax(int num1, int num2, int max) { if (num1 > num2) { max = num1; } else { max = num2; } } int main() { int max = 0; getMax(1, 2, max); printf("%d", max); }

0

What's the output of the following code segment: int main() { int num = 3; func(num); } void func(int x) { if (x > 0) { func(--x); printf("%d\n", x); func(x--); } }

0 1 0 2 0 1 0

What's the output of the following code segment? int main() { printf("%d\n", fib(3)); } int fib(int n) { if (n <= 1) { printf("%d\n", n); return n; } else { int fib1 = fib(n - 1); int fib2 = fib(n - 2); printf("%d\n", fib1 + fib2); return fib1 + fib2; } }

1 0 1 1 2 2

What's the output of the following code segment? int main() { factorial(4); } int factorial(int n) { if(n <= 1) { printf("%d\n", n); return 1; } else { int res = n * factorial(n - 1); printf("%d\n", res); return res; } }

1 2 6 24

What is the output of the following code? void a(double b) { b++; printf("%.1f", b); } int main() { a(10); }

11.0

What is the output of the following code? void a(double b) { b++; printf("%lf", b); } int main() { a(10); }

11.0

What is the output of the program? void method(int i, int num) { int j; for (j = 1; j <= i; j++) { printf("%d ", num); num *= 2; } printf("\n"); } int main() { int i = 1; while (i <= 5) { method(i, 2); i++; } }

2 2 4 2 4 8 2 4 8 16 2 4 8 16 32

After invoking method printStars, what is the value of n in the main method? void printStars(char symbol, int count) { while(count > 0) { printf("%c\n", symbol); count--; } } int main() { int n = 3; printStars('*', n); }

3

How many stars are displayed after the execution of the following code segment? long fib(long n) { printf("*"); if (n <= 1) { return n; } else { long fib1 = fib(n - 1); long fib2 = fib(n - 2); return fib1 + fib2; } }

5

What is the output of the following code segment? void a(int b) { b++; } int main() { int c = 5; a(c); printf("%d", c); }

5

What is the output of the following code? void a(int b) { b++; } int main() { int c = 5; a(c); printf("%d", c); }

5

What is the output of the following code? void m(double a) { printf("%f, a"); } void m(double b) { printf("%f", a*2); } int main() { m(2); }

Because the two methods have the same signature, the program has a compile error.

assume that a is defined another file and will be linked with the above code, which of the following statement is true? #include <stdio.h> int main() { extern a; printf("%d\n", a); }

Compile error because datatype of a is missing.

Which of the following statements are true about the following code segment? int main() { int num = 3; func(num); } void func(int x) { if (x > 0) { func(x--); printf("%d\n", x); func(x--); } }

It will result in infinite recursive calls.

For the following two methods, which one will be invoked by the statement double z = m(5, 6.4);? Method 1: int m(double x, double y) Method 2: int m(int x, double y) Method 3: int m(int x, int y)

Method 2

What is the scope of the variable declared in a user defined function?

Only inside the {} block that encloses the variable.

What does a method signature include?

The list of the parameter types method name

Based on the implementation of the following methods int calcLog(int num) { int res = 0; while(num > 0) { num = num / 2; res++; } return res; } int calcPow(int base, int exp) { int res = 1; while(exp-- > 0) { res *= base; } return res; }

What are the values of the following expressions: calcLog(10) : 4 calcPow(2, calcLog(10)): 16

Will the following program cause a compiler error? void print(int m) { } void print(int n) { } int main() { print(3); }

Yes

Given the following function prototype: float myfun(int a, double b); What is the return type of the function?

float

What's the output from the following program? int i = 0; int j = 0; int main() { int i = 2; int k = 3; { int j = 3; printf("i + j is %d\n", (i + j)); } k = i + j; printf("k is %d\n", k); printf("j is %d\n", j); }

i + j is 5 k is 2 j is 0

What is the output of the program? static void increment() { int i = 5; i += 5; printf("i = %d\n", i); } int main() { increment(); increment(); }

i = 10 i = 10

What is the output of the program? void increment() { static int i = 5; i += 5; printf("i = %d\n", i); } int main() { increment(); increment(); }

i = 10 i = 15

What's the output of the following code segment? #include <stdio.h> #include <string.h> #include <stdbool.h> bool isPalindrome(char *str, int size) { int i; for (i = 0; i < size; i++) { char left = str[i]; char right = str[size - 1 - i]; printf("%c %c\n", left, right); if (left != right) { return false; } } return true; } int main() { char val[] = "levVel"; printf("%s", isPalindrome(val, strlen(val)) == true ? "true" : "false"); } ###l l e e v V false ###

l l e e v V false

Which statements can complete the recursive implementation of the factorial method? int factorial(int num) { if (num == 0) return 1; else return _____________; }

num * factorial(num - 1) factorial(num - 1) * num

True or false: The return statement causes a function to terminate immediately

true

A function that does not need to return any value at all should have which return type?

void

What should be the return type of a function if there is no return value?

void

Given the macro definition: #define SQR(X) X * X

what is the value of SQR(3)? 9 and what is the value of SQR(2+3)? 11

What is the output of the following code? #include &lt;stdio.h&gt; void triple(double p) { p *= 3; } int main(){ double x = 1; double y = 1; triple(x); triple(y); printf("x is %d", x); printf(" y is %d\n", y); return 0; }

x is 1 y is 1

What's the value of x and y after the call of swap(x, y) as shown in the following code segment? void swap(double x, double y) { double temp = x; x = y; y = temp; } int main() { double x = 3.0; double y = 7.0; swap(x, y); }

x: 3.0 y: 7.0


Conjuntos de estudio relacionados

Chapter 33: Management of Patients With Nonmalignant Hematologic Disorders course point questions

View Set

(Unit 9) UAS Rules and Regulations Progress check

View Set

GLB Capstone Midterm (Chapter 3)

View Set

CFA Foundations Exam Ch. 1 - Ch. 20

View Set

Kinesiology topic The Shoulder and Arm "exam coach 4/26/21"

View Set

Chapter 6: Consumer Markets and Consumer Buying Behavior

View Set

Business 1.0-Chapter 17-Understanding Accounting and Financial Information

View Set