Making: math interpreter. Need to fix printf %f

src/kernel/kmain.c

@@ -39,7 +39,6 @@ int kmain(int retvalue)
   
   timer_install();
   keyboard_install();
-
   shell_install();
 
   return retvalue;

src/kernel/shell.c

@@ -21,7 +21,7 @@ void shell_install()
     }
     else if (strcmp(input_buffer, "help") == 0)
     {
-        printf("help\tpanic\twords\tprimes\trainbow\tclear\n");
+        printf("help\tpanic\twords\tprimes\trainbow\tclear\nmath\n");
     }
     else if (strcmp(input_buffer, "panic") == 0)
     {
@@ -43,6 +43,10 @@ void shell_install()
     {
 	program_clear();
     }
+    else if (strcmp(input_buffer, "math") == 0)
+    {
+	    program_math();
+    }
     else {
 	printf("Unknown command %s\n", input_buffer);
     }