For and While Loops
Proper syntax for writing a for-loop that runs 5 times
What is: for (int i = 0; i < 5; i++)?
How we know we have reached the end of a string
What is the null terminator OR What is /0?
int sigma(float beep, char boop) will return what type of variable
What is an integer?
The numerical value of the index that all arrays begin at
What is 0?
A pointer stores this
What is a memory address?
Proper syntax for a while loop that runs until variable int end equals 2
What is: while (int end != 2)?
Proper syntax for declaring a string that holds the word "jorts"
What is: char arr[6] = "jorts" ?
What is: float circlePerim(int radius) OR double circlePerim(int radius)?
How can I access the fifth element of an integer array arr and change it to equal 67?
What is "arr[4] = 67"?
Proper syntax for declaring a pointer p that points to a float x
What is: float *p = &x ?
In what case is it better to use for loops, and in what case is it better to use while loops
What is "For loops are better for things that need to run a specific number of times, whereas while loops are better for running until a certain condition is met"?
What does the function strcat() do
What is: Concatenate (aka combine) two strings together, putting the second at the end of the first?
Will the following code compile, if so, what will be printed?
#include <stdio.h>
int main(void)
{
int my_number = 5;
printf("The value of my_number is: %d\n", my_number);
{
int my_number = 10;
}
printf("The value of my_number is: %d\n", my_number);
return 0;
}
What is yes, and
"The value of my_number is: 5
The value of my_number is: 5"?
Proper syntax for declaring a double array that holds int size number of currently unknown elements
What is: double arr[size] ?
The way to access the value stored inside the variable a pointer p is pointing to
What is *p OR dereference operator?
How many times will "bepis" print?
for(int i = 0; i < 5; i++) {
for (int j = i; j < 3; j++) {
for(int k = 1; k < 4; k++) {
printf("bepis\n");
}
}
What is 18 times?
How many characters does the following string contain?
char string[] = "I am the Lorax,\nI speak for the trees.\n\0"
What is 40?
What will main print?
void add_num(int x, int y) {
x = x + y;
}
int main(void) {
int x = 10;
printf("At first x was %d\n", x);
add_num(20, 10);
printf("Now x is %d\n", x);
add_num(x, 10);
printf("While x is now %d\n", x);
return 0;
}
What is:
"At first x was 10
Now x is 10
While x is now 10"
Does the code compile, and if so, what does it print
void increase_by_one(int array[], int length) {
for (int i = 0; i < length; i++) {
array[i]++;
}
}
int main(void) {
int array[5] = {1, 2, 3, 4, 5};
increase_by_one(array, 5);
for (int i = 0; i < 5; i++) {
printf("%d\n", array[i]);
}
return 0;
}
What is yes, and "
2
3
4
5
6"?
How can we swap the values of two variables using pointers only
What is: "
void swap(int *a, int *b) {
int temp = *a;
*a = *b;
*b = temp;
}"?
How to write a while loop that ends when it reaches the end of a string str OR an when an int lele equals or is greater than 20, but is always guaranteed to run at least once?
do {
// thing
i++;
} while ((str[i] != /0) || (lele < 20))
How to find the length of a string str without using strlen() or any other pre-made function (write the code needed!)
What is:
int sum = 0;
while(str[i] != /0) {
sum++;
i++;
}
Using functions from the math library, create a function that returns the float value of the distance between two points, whose coordinates are also given as floats
Hint: There a few different ways of doing this -- but there is a way you can write it using only one line of code within your function!
What is:"
double distance_between_points(float x1, float y1, float x2, float y2)
{
return sqrt(pow(x2 - x1, 2) + pow(y2 - y1, 2));
}"?
Create a function that takes two integer arrays, array1 and array2, and the length of array1, that copies the contents of array1 into array2
Assume that array2 has at least as many elements as array1
What is: "
void copy_array(int *array1, int *array2, int length) {
for (int i = 0; i < length; i++) {
array2[i] = array1[i];
}
}"?
Does this compile, and if so, what does it print?
int main(void) {
int n = 43;
printf("%p\n", &*&*&*&*&*&*&n);
return 0;
}
What is yes, it prints 43?