GeeksforGeeks

In C and C++, comma (,) can be used in two contexts:

Following are the differences between malloc() and new().

Consider the below C/C++ program.

Write a C/C++ program that accepts a number from the user and prints “Even” if the entered number is even and prints “Odd” if the number is odd. Your are not allowed to use any comparison (==, < , >..etc) or conditional (if, else, switch, ternary operator,..etc) statement.

Recursion can be used to do both tasks in one line. Below are one line implementations for stracat() and strcmp().

Which of the following two code segments is faster? Assume that compiler makes no optimizations.

In C, functions are global by default. The “static” keyword before a function name makes it static. For example, below function fun() is static.

Consider the below program.

malloc() allocates memory block of given size (in bytes) and returns a pointer to the beginning of the block.

Asked by Shobhit
In C, array parameters are treated as pointers. The following two definitions of foo() look different, but to the compiler they mean exactly the same thing.

Question: Is there any example for which the following two loops will not work same way?

Well, we assume that you know what does it mean by pointer in C. So how do we create a pointer to an integer in C?
Huh..it is pretty simple..

Asked by Tanuj
Here is the standard prototype of printf function in C.

At the first look, it seems that writing a C macro which prints its argument is child’s play.

The Function prototype serves the following purposes -

We all know that a function in C can return only one value. So how do we achieve the purpose of returning multiple values.
Well, first take a look at the declaration of a function.

First of all, what is function overloading? Function overloading is a feature of a programming language that allows one to have many functions with same name but with different signatures.

Write a C program to show memory representation of C variables like int, float, pointer, etc.
Algorithm:
Get the address and size of the variable. Typecast the address to char pointer. Now loop for size of the variable and print the value at the typecasted pointer.

Solution: Use sprintf() function.

In the below code, change/add only one character and print ‘*’ exactly 20 times.