chore(CPlusPlus): add remove occurence of characters of 2nd string from the 1st string (#475)

Co-authored-by: Rahul Rajeev Pillai <66192267+Ashborn-SM@users.noreply.github.com>

algorithms/CPlusPlus/README.md

@@ -93,6 +93,7 @@
 3. [String reversal](Strings/string-reverse.cpp)
 4. [String tokanisation](Strings/string-tokeniser.cpp)
 5. [Anagram check](Strings/anagram.cpp)
+6. [Remove occurrences from string](algorithms/CPlusPlus/Strings/remove-occurrences.cpp)
 
 ## Trees
 

algorithms/CPlusPlus/Strings/remove-occurrences.cpp

@@ -0,0 +1,48 @@
+/*
+Description: A C++ program to remove occurrence of characters of 2nd string from the 1st string
+
+*/
+
+#include <string>
+#include <iostream>
+using namespace std;
+
+string removeChars(string s1, string s2) {
+    
+    string out;
+    //checking if the character of 2nd string is present in the 1st string
+    //if not present, appending the character in the output string
+    for (char c : s1) {
+  
+        if (s2.find(c) == string::npos) {
+      
+            out += c;
+        }
+    }
+    return out;
+}
+
+//main starts
+int main() {
+
+    string s1, s2;
+    cout << "Enter string 1: \n";
+    getline(cin, s1);
+    cout << "Enter string 2: \n";
+    getline(cin, s2);
+    string output = removeChars(s1, s2);
+    cout << output;
+    return 0;
+}
+
+/*
+Sample input
+Enter string 1: 
+computer
+Enter string 2: 
+cat
+
+output:
+ompuer
+(removed c,a,t)
+*/