diff --git a/sk1/compressor.c b/sk1/compressor.c
index f79f191..622fef4 100644
--- a/sk1/compressor.c
+++ b/sk1/compressor.c
@@ -172,7 +172,13 @@ int RLEcompress(struct Input input, struct Output* output) {
     return output->length;
 }
 
-void compress(FILE* infile, FILE* outfile) {
+int compress(const char* input_file_name, const char* output_file_name) {
+    FILE *infile = fopen(input_file_name, "rb");
+    if (infile == NULL) {
+        perror("Error opening input file");
+        return -1;
+    }
+
     fseek(infile, 0, SEEK_END);
     int insize = ftell(infile) + 1;
     rewind(infile);
@@ -185,6 +191,15 @@ void compress(FILE* infile, FILE* outfile) {
         assert(!ferror(infile));
     }
 
+    fclose(infile);
+
+    FILE *outfile = fopen(output_file_name, "wb");
+    if (outfile == NULL) {
+        perror("Error opening output file");
+        free(buffer);
+        return -1;
+    }
+
     struct Input input = {.buffer = buffer, .size = insize};
     struct Output tempOutput;
 
@@ -202,4 +217,7 @@ void compress(FILE* infile, FILE* outfile) {
     free(buffer);
     free(tempOutput.result);
     free(finalOutput.result);
-}
\ No newline at end of file
+
+    fclose(outfile);
+
+    return 0;