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. It’s preferable to use whichever syntax is more accurate for readability. If the pointer coming in really is the base address of a whole array, then we should use [ ].
Array parameters treated as pointers because of efficiency. It is inefficient to copy the array data in terms of both memory and time; and most of the times, when we pass an array our intention is to just tell the array we interested in, not to create a copy of the array.
Asked by Shobhit
GeeksforGeeks has prepared a complete interview preparation course with premium videos, theory, practice problems, TA support and many more features. Please refer Placement 100 for details
- Do not use sizeof for array parameters
- Difference between pointer to an array and array of pointers
- C program to sort an array using pointers
- Program to reverse an array using pointers
- Pointers in C and C++ | Set 1 (Introduction, Arithmetic and Array)
- Declare a C/C++ function returning pointer to array of integer pointers
- What is evaluation order of function parameters in C?
- Applications of Pointers in C/C++
- Features and Use of Pointers in C/C++
- What are near, far and huge pointers?
- Pointers in C/C++ with Examples
- Pointers vs References in C++
- The length of a string using pointers
- What are Wild Pointers? How can we avoid?
- Chain of Pointers in C with Examples