make 'examples' plural

examples/bench.cpp

@@ -0,0 +1,38 @@
+#include <ctime>
+#include <iostream>
+#include <iomanip>
+
+#include <tc/solver.hpp>
+#include <tc/groups.hpp>
+
+template<class G>
+void test(const G &group) {
+    auto s = std::clock();
+    auto cosets = tc::solve(group, {0});
+    auto e = std::clock();
+
+    double diff = (double) (e - s) / CLOCKS_PER_SEC;
+    int order = cosets.order();
+
+    std::cout
+        << std::setw(7) << group.name << ", "
+        << std::setw(7) << order << ", "
+        << std::fixed << std::setprecision(6) << diff << "s"
+        << std::endl;
+}
+
+int main() {
+    test(tc::group::H<2>());
+    test(tc::group::H<3>());
+    test(tc::group::H<4>());
+    test(tc::group::T(100));
+    test(tc::group::T(500));
+    test(tc::group::T(1000));
+    test(tc::group::E<6>());
+    test(tc::group::E<7>());
+    test(tc::group::B<6>());
+    test(tc::group::B<7>());
+    test(tc::group::B<8>());
+
+    return 0;
+}