diff --git a/makefile b/makefile
index 4a0450b..4648c2c 100644
--- a/makefile
+++ b/makefile
@@ -28,3 +28,6 @@ build: $(SRC)
 
 format: $(SRC)
 	$(FORMATTER) $(SRC)
+
+test: $(OUTPUT)
+	/bin/echo -e "123\n45 67" | ./$(OUTPUT)
diff --git a/wc b/wc
index c592776..6d987bf 100755
Binary files a/wc and b/wc differ
diff --git a/wc.c b/wc.c
index a12f360..a154f59 100644
--- a/wc.c
+++ b/wc.c
@@ -1,10 +1,23 @@
-#include <unistd.h>
 #include <stdio.h>
+#include <unistd.h> // read, isatty
 
-int main(){
-	char buffer[1];
-	while(read(0,buffer,sizeof(buffer)) > 0){
-		printf("%c", buffer[0]);
-	}
-	return 0;
+// STDIN_FILENO
+int process_fp(FILE* fp)
+{
+    char buffer[1];
+    while (read(0, buffer, sizeof(buffer)) > 0) {
+        printf("%c", buffer[0]);
+    }
+		return 0;
+}
+
+int main(int argc, char** argv)
+{
+    //
+    if (!isatty(STDIN_FILENO)) { // check if stdin is coming from terminal or pipeline
+        return process_fp(STDIN_FILENO);
+    } else if(argc > 1){
+			printf("To do");
+		}
+    return 0;
 }