4 files changed, 62 insertions, 0 deletions
diff --git a/graphs/cpp/replace/inputfile b/graphs/cpp/replace/inputfile
new file mode 100644
index 0000000..b4e5a2f
--- /dev/null
+++ b/graphs/cpp/replace/inputfile
@@ -0,0 +1 @@
+abcabcbc
+\ No newline at end of file
diff --git a/graphs/cpp/replace/replace.cc b/graphs/cpp/replace/replace.cc
new file mode 100644
index 0000000..c24bf05
--- /dev/null
+++ b/graphs/cpp/replace/replace.cc
@@ -0,0 +1,39 @@
+#include "replace.hh"
+
+#include <fstream>
+#include <iostream>
+#include <string>
+
+void replace(const std::string& input_filename,
+             const std::string& output_filename, const std::string& src_token,
+             const std::string& dst_token)
+{
+    std::ofstream file_out;
+    file_out.open(output_filename);
+
+    if (!file_out.is_open())
+    {
+        std::cerr << "Cannot write output file\n";
+        return;
+    }
+
+    std::ifstream file_in;
+    file_in.open(input_filename);
+    if (!file_in.is_open())
+    {
+        std::cerr << "Cannot open input file\n";
+        return;
+    }
+
+    std::string token;
+    while (std::getline(file_in, token))
+    {
+        std::string::size_type n = 0;
+        while ((n = token.find(src_token, n)) != std::string::npos)
+        {
+            token.replace(n, src_token.size(), dst_token);
+            n += dst_token.size();
+        }
+        file_out << token << "\n";
+    }
+}
+\ No newline at end of file
diff --git a/graphs/cpp/replace/replace.hh b/graphs/cpp/replace/replace.hh
new file mode 100644
index 0000000..cbb2e46
--- /dev/null
+++ b/graphs/cpp/replace/replace.hh
@@ -0,0 +1,6 @@
+#pragma once
+#include <string>
+
+void replace(const std::string& input_filename,
+             const std::string& output_filename, const std::string& src_token,
+             const std::string& dst_token);
+\ No newline at end of file
diff --git a/graphs/cpp/replace/test_replace.cc b/graphs/cpp/replace/test_replace.cc
new file mode 100644
index 0000000..be7a488
--- /dev/null
+++ b/graphs/cpp/replace/test_replace.cc
@@ -0,0 +1,16 @@
+#include <iostream>
+
+#include "replace.hh"
+
+int main(int argc, char** argv)
+{
+    if (argc < 5)
+    {
+        std::cerr << "Usage: INPUT_FILE OUTPUT_FILE SRC_TOKEN DST_TOKEN\n";
+        return 1;
+    }
+
+    replace(argv[1], argv[2], argv[3], argv[4]);
+
+    return 0;
+}