/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

0 vote280 views1 answer
Insert only unique values into vector
C++
0 vote275 views7 answers
C code to mips assembly converter online
C++
0 vote293 views1 answer
C++ fill string with random uppercase letters
C++
1 vote296 views1 answer
G++ compile c++11
C++
189 votes466 views10 answers
New Year's Eve
C++
0 vote359 views1 answer
Vector size for loop
C++
1 vote314 views3 answers
C++ concatenate strings
C++
0 vote283 views1 answer
How to rotate canvas android
C++
0 vote279 views1 answer
Flake8 max line length
C++
1 vote274 views1 answer
Controlling in windows
C++