add function that simply echoes back from stdinput

makefile

@@ -0,0 +1,30 @@
+# Interface: 
+#   make
+#   make build
+#   make format
+
+# Compiler
+CC=gcc
+# CC=tcc # <= faster compilation
+
+# Main file
+SRC=wc.c
+OUTPUT=wc
+
+## Flags
+DEBUG= #'-g'
+STANDARD=-std=c99
+WARNINGS=-Wall
+OPTIMIZED=-O0
+# OPTIMIZED=-O3  #-Ofast
+
+## Formatter
+STYLE_BLUEPRINT=webkit
+FORMATTER=clang-format -i -style=$(STYLE_BLUEPRINT)
+
+## make build
+build: $(SRC)
+	$(CC) $(OPTIMIZED) $(DEBUG) $(SRC) -o $(OUTPUT)
+
+format: $(SRC)
+	$(FORMATTER) $(SRC)

wc.c

@@ -0,0 +1,10 @@
+#include <unistd.h>
+#include <stdio.h>
+
+int main(){
+	char buffer[1];
+	while(read(0,buffer,sizeof(buffer)) > 0){
+		printf("%c", buffer[0]);
+	}
+	return 0;
+}