From a41bb158fba7d631e477cbac424274c9dafd59be Mon Sep 17 00:00:00 2001
From: Guillaume Horel <guillame.horel@gmail.com>
Date: Tue, 9 Feb 2016 13:05:58 -0500
Subject: Add const where it makes sense
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C'est bien de marquer les methods qui ne modifient pas l'objet comme const
De même que les variables qui ne sont jamais modifiées (comme I).
---
 stratified_sampling.hpp | 22 +++++++++++-----------
 1 file changed, 11 insertions(+), 11 deletions(-)

diff --git a/stratified_sampling.hpp b/stratified_sampling.hpp
index cf857ec..76fafbf 100644
--- a/stratified_sampling.hpp
+++ b/stratified_sampling.hpp
@@ -51,11 +51,11 @@ struct stratified_sampling {
         :p(p), X(X), mean(p.size(), 0), sigma2(p.size(), 0), I(p.size()){};
     void update(int N);
     void draw();
-    vector<double> get_mean();
-    vector<double> get_var();
-    void print_mean();
-    void print_sigma();
-    pair<double,double> estimator();
+    vector<double> get_mean() const;
+    vector<double> get_var() const;
+    void print_mean() const;
+    void print_sigma() const;
+    pair<double,double> estimator() const;
 private:
     vector<double> p;
     vector<int> M;
@@ -63,7 +63,7 @@ private:
     vector<double> mean;
     vector<double> sigma2;
     vector<L> X;
-    int I;
+    const int I;
 };
 
 //actualisation du nombre de tirages à faire par strates
@@ -127,17 +127,17 @@ void stratified_sampling<L>::draw() {
 };
 
 template <typename L>
-vector<double> stratified_sampling<L>::get_mean() {
+vector<double> stratified_sampling<L>::get_mean() const {
     return mean;
 };
 
 template <typename L>
-vector<double> stratified_sampling<L>::get_var() {
+vector<double> stratified_sampling<L>::get_var() const {
     return sigma2;
 };
 
 template <typename L>
-void stratified_sampling<L>::print_mean() {
+void stratified_sampling<L>::print_mean() const {
 	cout<<"les espérances :"<<endl;
 	    for(int i=0;i<I;i++){
         cout<<mean[i]<<"\t";
@@ -146,7 +146,7 @@ void stratified_sampling<L>::print_mean() {
 };
 
 template <typename L>
-void stratified_sampling<L>::print_sigma() {
+void stratified_sampling<L>::print_sigma() const {
 	cout<<"les écarts types :"<<endl;
 	    for(int i=0;i<I;i++){
         cout<<sqrt(sigma2[i])<<"\t";
@@ -155,7 +155,7 @@ void stratified_sampling<L>::print_sigma() {
 };
 
 template <typename L>
-pair<double,double> stratified_sampling<L>::estimator() {
+pair<double,double> stratified_sampling<L>::estimator() const {
 	double est_mean = 0;
 	double est_std = 0;
 	for (int i=0; i<I; i++) {
-- 
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