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memory allocation problem

I am a beginner in c++ program I faced a problem showing segment failure. my code is: int main(){ string *ptr; ptr = (string*) malloc(sizeof(string)); cin >> *ptr; free(ptr); }

3rd May 2021, 4:47 PM
Soomeet Kumar
Soomeet Kumar - avatar
1 Answer
In C++ you should use the 'new' keyword to allocate memory in the heap instead of malloc(). Instead of doing string* ptr = (string*)malloc(sizeof(string)); you can just do: string* ptr = new string; and to free memory you don't use the free() function, you use the 'delete' keyword. Instead of free(ptr); you type: delete ptr; The malloc function might be in C++ (i'm not sure) but from what I've read, you should rarely use it, and should just use 'new' instead.
3rd May 2021, 5:14 PM
Odyel - avatar