c++ method code that returns an array from a function
- 2020-06-23 01:38:48
- OfStack
How does c++ return an array from a function?
C++ returns an array from a function
C++ is not allowed to return an entire array as an argument to a function. However, you can return a pointer to the array by specifying the name of the unindexed array.
If you want to return a 1-dimensional array from a function, you must declare a function that returns a pointer, as follows:
int * myFunction()
{
.
.
.
}
In addition, C++ does not support returning the address of a local variable outside a function unless the local variable is defined as static.
Now, let's look at the following function, which generates 10 random Numbers and returns them using an array, as follows:
The instance
#include <iostream>
#include <cstdlib>
#include <ctime>
using namespace std;
// Functions to generate and return random Numbers
int * getRandom( )
{
static int r[10];
// Set the seeds
srand( (unsigned)time( NULL ) );
for (int i = 0; i < 10; ++i)
{
r[i] = rand();
cout << r[i] << endl;
}
return r;
}
// To call the main function that defined the function above
int main ()
{
// 1 A pointer to an integer
int *p;
p = getRandom();
for ( int i = 0; i < 10; i++ )
{
cout << "*(p + " << i << ") : ";
cout << *(p + i) << endl;
}
return 0;
}
When the above code is compiled and executed, it produces the following results:
624723190
1468735695
807113585
976495677
613357504
1377296355
1530315259
1778906708
1820354158
667126415
*(p + 0) : 624723190
*(p + 1) : 1468735695
*(p + 2) : 807113585
*(p + 3) : 976495677
*(p + 4) : 613357504
*(p + 5) : 1377296355
*(p + 6) : 1530315259
*(p + 7) : 1778906708
*(p + 8) : 1820354158
*(p + 9) : 667126415
That's how c++ returns an array from a function, and if you have anything to add you can contact this site.