1 files changed, 32 insertions, 0 deletions

diff --git a/04/main.l b/04/main.l
new file mode 100644
index 0000000..28593f6
--- /dev/null
+++ b/04/main.l
@@ -0,0 +1,32 @@
+%{
+
+int scans = 0;
+int prints = 0;
+%}
+
+%%
+scanf {
+    scans++;
+    fprintf(yyout, "readf");
+};
+printf {
+    prints++;
+    fprintf(yyout, "writef"); 
+}
+. fprintf(yyout, "%s", yytext);
+\n fprintf(yyout, "\n");
+%%
+
+int main(void) {
+    yyin=fopen("4/input", "r+");
+    yyout=fopen("4/output", "w");
+    yylex();
+    printf("%d printf occurrence(s)\n", prints);
+    printf("%d scanf  occurrence(s)\n", scans);
+}
+
+int yywrap()
+{
+    return(1);
+}
+