added head

src/head.c

@@ -0,0 +1,37 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int
+head(FILE *file, int lines)
+{
+  int a;
+  int c = 0;
+  while((a = fgetc(file)) != EOF)
+    {
+      if(a == '\n')
+        {
+          ++c;
+        }
+      putchar(a);
+      if(c == lines)
+        return lines;
+    }
+  return lines;
+
+}
+
+int
+main(int argc, char *argv[])
+{
+  int lines = 10;
+  if(argc == 1)
+    head(stdin,lines);
+  if(argc == 2)
+    head(fopen(argv[1],"r"),lines);
+  if(argc == 3)
+    {
+      lines = abs(atoi(argv[1]));
+      head(fopen(argv[2],"r"),lines);
+    }
+  return 0;
+}