qsort form a vector c++ code example
Example: quick sort predefined function in c++
#include <cstdlib>
//declare compare
int compare(const void* a, const void* b)
{
const int* x = (int*) a;
const int* y = (int*) b;
if (*x > *y)
return 1;
else if (*x < *y)
return -1;
return 0;
}
//fuction used
qsort(arr,num,sizeof(int),compare);