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Mastering C++ cstring memset(): Simplifying Memory Initialization North West Delhi
- Location: North West Delhi, Delhi, India
memset() is a standard C++ cstring memset() used for setting a block of memory to a specific value.
It is commonly used for initializing arrays or resetting memory buffers.
Syntax:
void* memset(void* ptr, int value, size_t num);
Parameters:
ptr: Pointer to the block of memory to fill.
value: Value to be set (interpreted as an unsigned char).
num: Number of bytes to set.
Return Value: Returns a pointer to the memory block (ptr).
Usage Examples
#include <cstring>
#include <iostream>
int main() {
char arr[10];
memset(arr, 'A', sizeof(arr));
arr[9] = '\0'; // Null-terminate the string
std::cout << "Array after memset: " << arr << std::endl;
return 0;
}
Applications:
Initializing arrays to a specific value.
Resetting memory buffers before reuse.
Setting flags or markers in data structures.
Best Practices:
Ensure that num does not exceed the size of the allocated memory.
Use with caution when dealing with non-trivial types.
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