#include int main() { using namespace matplot; std::vector y2010 = {50, 0, 100, 95}; std::vector y2011 = {65, 22, 97, 120}; std::vector labels = {"Investments", "Cash", "Operations", "Sales"}; tiledlayout(2, 1); auto ax1 = nexttile(); pie(ax1, y2010); title("2010"); auto ax2 = nexttile(); pie(ax2, y2011); title("2011"); show(); return 0; }