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C++ cstring memset() function

❮ CString Functions

Example

Fill an array with zeroes:

int myNumbers[5] = {10, 20, 30, 40, 50};
memset(myNumbers, 0, sizeof(myNumbers));
for (int i = 0; i < 5; i++) {
  cout << myNumbers[i] << "\n";
}
Try it Yourself »

Definition and Usage

The memset() function writes a specified value into every byte of the specified memory block.

The memset() function is defined in the <cstring> header file.

Syntax

memset(void * destination, int value, size_t size);

The size_t data type is a positive integer.

Parameter Values

Parameter Description
destination Required. A pointer to the block of memory to write to.
value Required. The value to write into every byte of the memory block.
size Required. The size of the memory block measured in bytes.

Technical Details

Returns: A void type pointer to the block of memory.

❮ CString Functions