added example to the main Readme

Author: aodinokov

README.md

@@ -11,5 +11,54 @@ Reflection implementation is based on [DWARF](https://en.wikipedia.org/wiki/DWAR
 
 **Features**:
 
-* 'Deep' functionality for printing, copying, comparing, and freeing memory of complex data structures: [demo link](/doc/demo/README.md#how-to-demo).
+* Reflection for all native C types.
+* 'Deep' functionality for printing, copying, comparing, and freeing memory of complex data structures.
 * Supported on Ubuntu, macOS, Windows (msys2) with gcc or clang
+
+[**Example**](/examples/c_app_simplest/):
+
+```c
+#include <stdio.h>  // printf
+#include <stdlib.h> // free
+#include <math.h>   // M_PI, M_E
+#include "metac/reflect.h"
+
+struct test {
+    int y;
+    char c;
+    double pi;
+    double e;
+    short _uninitialized_field;
+};
+
+int main(){
+    // we need to use this construction to wrap variable declaration
+    // to get its type information
+    WITH_METAC_DECLLOC(decl_location,
+        struct test t = {
+            .y = -10,
+            .c = 'a',
+            .pi = M_PI,
+            .e = M_E,
+        };
+    )
+    metac_value_t *p_val = METAC_VALUE_FROM_DECLLOC(decl_location, t);
+
+    char * s;
+    s = metac_entry_cdecl(metac_value_entry(p_val));
+    // next will output "struct test t = "
+    printf("%s = ", s);
+    free(s);
+
+    s = metac_value_string(p_val);
+    // next will output "{.y = -10, .c = 'a', .pi = 3.141593, .e = 2.718282, ._uninitialized_field = 0,};\n"
+    printf("%s;\n", s);
+    free(s);
+
+    metac_value_delete(p_val);
+
+    return 0;
+}
+```
+
+To get more details please refer to the [How to](/doc/demo/README.md#how-to-demo) document.

examples/c_app_simplest/main.c

@@ -1,6 +1,6 @@
-#include <stdio.h> // printf
+#include <stdio.h>  // printf
 #include <stdlib.h> // free
-#include <math.h> // M_PI, M_E
+#include <math.h>   // M_PI, M_E
 #include "metac/reflect.h"
 
 struct test {