Merge pull request #673 from adherent9870/newm

replace x by c

Author: Sirajmolla

LeetCode/replacecc.cpp

@@ -0,0 +1,23 @@
+#include <iostream>
+#include <string>
+using namespace std;
+void cc(string s,char a,char b){
+    if(s.length()==0){
+        return;
+    }
+    if (s[0]==a) {
+        s[0]=b;
+        cc(s.substr(1),a,b);
+    }
+    cc(s.substr(1),a,b);;
+}
+int main(){
+    string s="asdfgh";
+    char a='a',b='z';
+ /*   cin >> s;
+    cin >> a >> b;
+*/
+    cc(s,a,b); 
+    cout<<s;
+
+}