/C++/How to dynamically allocate an array c++

How to dynamically allocate an array c++

int* a = NULL;   // Pointer to int, initialize to nothing.
int n;           // Size needed for array
cin >> n;        // Read in the size
a = new int[n];  // Allocate n ints and save ptr in a.
for (int i=0; i<n; i++) {
    a[i] = 0;    // Initialize all elements to zero.
}
. . .  // Use a as a normal array
delete [] a;  // When done, free memory pointed to by a.
a = NULL;     // Clear a to prevent using invalid memory reference.

Source: fredosaurus.com

Similar codes

-1 vote253 views1 answer
Palindrome no example
C++
4 votes258 views1 answer
Git branch in my bash prompt
C++
0 vote251 views1 answer
How to add an element to std::map
C++
-1 vote279 views2 answers
Delete file cpp
C++
0 vote263 views1 answer
Add partition mysql
C++
0 vote294 views1 answer
How to find total numbe of distinct characters in a string in c
C++
0 vote266 views1 answer
Remove the jth object from the subset
C++
0 vote261 views2 answers
Get min and max element index from vector c++
C++
0 vote276 views1 answer
How to use tostring method in c++
C++
0 vote294 views1 answer
Std::cout and cout
C++