improve readme

README.md

@@ -2,9 +2,16 @@
 
 Include soi and you're ready to go!
 
-## dbg(...)
+## Features
 
-You can debug any expressions using the macro dbg().
+- includes all headers (a `bits/stdc++.h` that works on all platforms)
+- has a powerful `dbg()` macro
+- disables output buffering
+- checks whether all input has been read
+- removes evil functions from the standard library such as new and printf.
+- defines int to 64 bit
+
+The header requires at least C++11.
 
 ## Configuration
 
@@ -21,7 +28,7 @@ this check using `SOI_EOFCHECK=1`.
 ## Template
 Using this header is as simple as:
 
-```
+```c++
 #include <soi>
 
 signed main() {
@@ -29,4 +36,24 @@ signed main() {
 }
 ```
 
-It requires at least c++11 to function.
+## Example
+See example.cpp for a larger example.
+
+```c++
+#include <soi>
+signed main() {
+  dbg("hi");
+  vector<int> pi{3,1,4,1,5,9,2,6};
+  dbg(pi);
+  int x=4;
+  dbg(x+3);
+}
+```
+
+prints:
+
+```
+[test.cpp:3 (main)] hi
+[test.cpp:5 (main)] pi = [3, 1, 4, 1, 5, 9, 2, 6] (vector<long int>)
+[test.cpp:7 (main)] x+3 = 7 (long int)
+```