diff --git a/cplusplus/p0004.cpp b/cplusplus/p0004.cpp
index e5714582..ff691c38 100644
--- a/cplusplus/p0004.cpp
+++ b/cplusplus/p0004.cpp
@@ -22,6 +22,8 @@ unsigned int p0004() {
         for (j = 100; j < 1000; j++)    {
             prod = i * j;
             char buf[8] = {};
+            // I know snprintf exists, but it isn't defined in C++98,
+            // and this isn't taking in user input
             sprintf(buf, "%u", prod);
             std::string forward(buf);
             std::string reverse = forward;
diff --git a/cplusplus/p0034.cpp b/cplusplus/p0034.cpp
index 8ef6a460..be5df5d7 100644
--- a/cplusplus/p0034.cpp
+++ b/cplusplus/p0034.cpp
@@ -21,6 +21,8 @@ unsigned long long p0034() {
     for (unsigned long i = 10; i < 100000; i++) {
         sum = 0;
         char buf[8] = {};
+        // I know snprintf exists, but it isn't defined in C++98,
+        // and this isn't taking in user input
         sprintf(buf, "%lu", i);
         for (unsigned char j = 0; j < 8; j++)   {
             if (!buf[j]) break;