Some local temp string as std::string.

dw/hyphenator.cc

@@ -28,6 +28,8 @@
 #include <stdio.h>
 #include <string.h>
 
+#include <string>
+
 #define LEN 1000
 
 /*
@@ -50,11 +52,8 @@ Hyphenator::Hyphenator (const char *patFile, const char *excFile, int pack)
 {
    trie = NULL; // As long we are not sure whether a pattern file can be read.
 
-   int bufLen = strlen (patFile) + 5 + 1;
-   char *buf = new char[bufLen];
-   snprintf(buf, bufLen, "%s.trie", patFile);
-   FILE *trieF = fopen (buf, "r");
-   delete[] buf;
+   using namespace std::literals::string_literals;
+   FILE *trieF = fopen ( (patFile + ".trie"s).c_str(), "r");
 
    if (trieF) {
       trie = new Trie ();