Pass array to function c without size. For example, consider this code: void doubleArray(int* arr, int size) { Apr 5, 2022 · Thank you very much for your reply! What Im actually trying to do: Read the filenames from a SD card Write these filenames into an array Pass this array to a class to display the filenames What would be the best approach for the arrays declaration to do so? Jul 10, 2011 · 2 WHen an array is passed in C or C++ only its address is passed. Arrays passed to functions are automatically converted to pointers. When calling the function, simply pass the address of the array (that is, the array’s name) to the called function. First the array does not get copied. Jul 25, 2025 · Explore why sizeof doesn't work for C arrays passed to functions and discover practical solutions, including passing the length and using C++ templates. Passing a C++ container to a function it doesn't decay to a pointer. Of course, in C you can pass an array bigger than that, because C doesn't check array bounds and the array decays to a pointer. In C++, an array can be passed in a function using a pointer or reference. Memory is allocated on the heap area instead of stack. Dec 12, 2025 · Dynamic memory allocation allows a programmer to allocate, resize, and free memory at runtime. guyeg ycgpc nei mbbw bqsryv yzu psex unhi cwu uqer