diff --git "a/S\303\251rie 13/stdin_read.cc" "b/S\303\251rie 13/stdin_read.cc"
index 0880c8c..56ca2af 100644
--- "a/S\303\251rie 13/stdin_read.cc"	
+++ "b/S\303\251rie 13/stdin_read.cc"	
@@ -1,43 +1,43 @@
 // stdin_read.cc
 // Auteur : Quentin Berling
 // Version : 1.0
 #include <iostream>
 #include <string>
 using namespace std;
 
 bool is_number(const string &s);
 
 int main() {
 	int i(0), a(0);
 	string cstring;
 
 	while(cin) {
 		cin >> cstring;
 		if (is_number(cstring) == true) {
 			a+=stoi(cstring);
 			cstring.clear();
 			++i;
 		}
 	}
 	
 	if (i > 0) { 
 		cout << "La moyenne des entiers entrés  est " << 1.0*a/i << "." << endl;
 	}
 
 	return 0;
 }
 
 bool is_number(const string &s) {
-	std::string::const_iterator it = s.begin();
-	while (it != s.end() && (std::isdigit(*it) || (*it == '-'))) 
+	string::const_iterator it = s.begin();
+	while (it != s.end() && (isdigit(*it) || (*it == '-'))) 
 		++it;
 	return !s.empty() && it == s.end();
 // 	size_t nb(0);
 // 	if (s.size() != 0) {
 // 		long x=stol(s, &nb);
 // 	} else {
 // 		return 0;
 // 	}
 // 	
 // 	return (nb == s.size());
 }