From 37e7d24066bd59c51263b1e045dab1ada4ea4769 Mon Sep 17 00:00:00 2001
From: Guillaume Horel <guillaume.horel@serenitascapital.com>
Date: Mon, 1 Feb 2016 15:15:13 -0500
Subject: C++11 me voilà!
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---
 Makefile                | 2 +-
 stratified_sampling.cpp | 6 +++---
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/Makefile b/Makefile
index 2ffcd8f..c412ee3 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 CXX=g++
 CC=gcc
 RM = rm
-CXXFLAGS=-O3
+CXXFLAGS=-std=c++11 -O3
 GSL_FLAGS:=$(shell pkg-config --libs gsl)
 
 stratified_sampling: rtnorm.o stratified_sampling.o
diff --git a/stratified_sampling.cpp b/stratified_sampling.cpp
index 22bdbf5..f6c3ff1 100644
--- a/stratified_sampling.cpp
+++ b/stratified_sampling.cpp
@@ -26,9 +26,9 @@ double quantile_truncate_normal (int i, int n, double mu,
 
 std::pair<double, double> mean_var( std::vector<double> r){
     std::pair<double, double> p;
-    for(int i=0; i<r.size(); i++){
-        p.first += r[i];
-        p.second += r[i]*r[i];
+    for(auto &x: r){
+        p.first += x;
+        p.second += x*x;
     }
     p.first /= r.size();
     p.second /= r.size();
-- 
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