C++ deck

Question 1

How to execute code in C++

Answer 1

You have to call the function main()

Question 2

When does the program stop running?

Answer 2

When the function returns a value, the program stops executing, it starts executing at the line of main()

Question 3

What is the meaning of a function?

Answer 3

A function is the start of the code that contains the return type(can be an int, double, or whatever) and the main function is the first function that is run or executes in a c++ file

Question 4

True or false: the main function MUST return an integer

Answer 4

True, as it is named int main()

Question 5

What is static type checking?

Answer 5

Checking to make sure that the variables and parameters are the data type that it is coded for before the main function runs(or before the program starts running) to identify errors.

Question 6

What are all the data types in C++?

Answer 6

char, boolean, int, double, float, long (know what the difference between each data type is completely I don’t really understand that)

Question 7

How to check the size of the data type?

Answer 7

You use the size function and the name of the data type

Ex: sizeof(int);, sizeof(long);

Question 8

Expression statement

Answer 8

A single expression followed by a semicolon

Ex: a = 3; a + b;

Question 9

Compound statement

Answer 9

A group of statements surrounded by brackets and are executed in order

Question 10

Different control structures

Answer 10

if (variable > somevalue){
//this code will execute in order
}

Question 11

switch statement

Answer 11

is kind of like an if sttaement, is formatted as

switch(value){
case 1:
//statements, 1 is compared with the value
break; (if you don’t have this, then the code will not stop running)
case 2:
// statements
default:
// this is when the value is not equal to 1 and 2
}

Question 12

What are the different loops?

Answer 12

while, do while, and for.
while(value < somevalue){
// statements
}

do{
// statements
} while(x < value);

for (int i = 0; i < 5; ++i){
// statements
}

Question 13

GO BACK TO INTRO TO C++ SLIDES

Answer 13

YES

Question 14

Namespace

Answer 14

It’s like a container to put your functions and other things (like names and variables) and you can use that name of namespace to access those things

For example:
namespace first_space {
int add (int a, int b){
return a + b;
}
}
And then the way you would use these things in the main function is like this
int main(){
first_space::add(1, 2);
}

Question 15

How are strings defined in C?

Answer 15

They are defined through the use of arrays, for example char a[] = “abcd”; or car c[50] = “bcdf” (specifices the length of the char)

Question 16

What’s the difference in C++(compared to C)

Answer 16

A string is defined by doing #include <string> as one of the preprocessor directives(because it accesses std:string) and then defining the variable ex:</string>

string variableName = “hello”;

Question 17

how would you compare strings?

Answer 17

You would just do if (variableName == variableName){
return value;
}