code. compile. run. debug. share.
Source Code
Language
#include <cstdio>
#include <cstdlib>
#include <iostream>
#include <iterator>
#include <algorithm>
#define SIZEOF_ARRAY(array) (sizeof(array) / sizeof(*array))
int main()
{
// Lambda expression
auto compare = [](const void *lhs, const void *rhs)
{
int l = *static_cast<const int *>(lhs);
int r = *static_cast<const int *>(rhs);
return l - r;
};
int data[] = { 3, 7, 5, 8, 7, 2, 9, 4, 1, 7, 6, 0 };
size_t size = SIZEOF_ARRAY(data);
qsort(data, size, sizeof(int), compare);
copy(std::begin(data), std::end(data), std::ostream_iterator<int>(std::cout, " "));
std::cout << '\n';
int val = 7;
auto ans = static_cast<int *>(bsearch(&val, data, size, sizeof(int), compare));
if (ans != nullptr)
std::cout << *ans << " found on index " << (ans - data) << '\n';
else
std::cout << val << " not found\n";
}
Compiling Program...
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