How Can I Efficiently Resize Dynamic Memory in C Without `realloc`?

Reallocation in C : Unveiling Alternatives to Resize

In the realm of memory management, reallocation plays a crucial role. While C lacks a dedicated reallocation function, it offers viable alternatives to effectively resize dynamic memory allocations.

One prevalent challenge arises when a program requires expanding a memory buffer to accommodate increasing data. Deleting the existing pointer and allocating a new, larger one may not be an optimal approach. Instead, consider leveraging vector, a powerful tool in the C standard library.

To illustrate the conversion:

From C:

Type* t = (Type*)malloc(sizeof(Type)*n) 
memset(t, 0, sizeof(Type)*m)

To C (using vector):

std::vector<Type> t(n, 0);

Reallocation in C:

t = (Type*)realloc(t, sizeof(Type) * n2);

Reallocation in C (using vector):

t.resize(n2);

For function parameters, the vector can be passed using its element pointer:

From C:

Foo(t)

To C :

Foo(&t[0])

Vector, being a smart C-array, ensures that this modification adheres to correct C syntax. Utilize these alternatives to efficiently manage memory in your C programs, providing a flexible and optimized approach to data manipulation.

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