Created read method on MString to read from sockets.

MString.cpp

@@ -6,6 +6,8 @@
 #include <format>
 #include <iomanip>
 #include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
 
 namespace coreutils {
    
@@ -247,6 +249,13 @@ namespace coreutils {
       }
       length = size;
    }
+
+   MString &MString::read(int fd) {
+      char ch;
+      while(::read(fd, &ch, 1))
+	write(ch);
+      return *this;
+   }
    
    int MString::offset() {
       return cursor - data;

MString.h

@@ -213,6 +213,12 @@ namespace coreutils {
       ///
       
       MString &write(ZString &value);
+
+      ///
+      /// Read data from a socket and store in MString.
+      ///
+
+      MString &read(int fd);
       
       int offset();
       

compile

@@ -5,7 +5,7 @@ do
    filename="${file%.*}"
    list="$list $filename.o"
    echo -n "Compiling $filename..."
-   g++ -g -c $file -std=c++20 &
+   g++ -g -c $file -std=c++23 &
    if [ $? = '0' ]
    then
     echo "OK"