fix: delete memory allocated by 'new' before exiting

protobuf_rw_file.cpp

@@ -33,21 +33,30 @@ int main(int argc, char **argv) {
     auto dataSize1 = fread(dataBuff1, sizeof(char), BUFF_SIZE, fp);
     fclose(fp);
     if (dataSize1 >= BUFF_SIZE) {
-        fprintf(stderr, "Error: file size greater than 16 MB: '%s'\n", argv[1]);
+        fprintf(stderr, "Error: file size is greater than 16 MB: '%s'\n", argv[1]);
+        delete[] dataBuff1;
         return 1;
     }
 
     // assign values to the object pbFile1
     PBFile pbFile1;
     pbFile1.set_data_size(dataSize1);
     pbFile1.set_data_buff(dataBuff1, dataSize1);
+//  printf("pbFile1.data_size(): %ld\n", pbFile1.data_size());
+//  printf("pbFile1.data_buff().size(): %ld\n", pbFile1.data_buff().size());
+//  printf("pbFile1.data_buff().length(): %ld\n", pbFile1.data_buff().length());
+//  printf("strlen(pbFile1.data_buff().c_str()): %ld\n", strlen(pbFile1.data_buff().c_str()));
 
     // serialize the object pbFile1 to a string
     auto serializedStr = pbFile1.SerializeAsString();
 
     // deserialize a string to the object pbFile2
     PBFile pbFile2;
     pbFile2.ParseFromString(serializedStr);
+//  printf("pbFile2.data_size(): %ld\n", pbFile2.data_size());
+//  printf("pbFile2.data_buff().size(): %ld\n", pbFile2.data_buff().size());
+//  printf("pbFile2.data_buff().length(): %ld\n", pbFile2.data_buff().length());
+//  printf("strlen(pbFile2.data_buff().c_str()): %ld\n", strlen(pbFile2.data_buff().c_str()));
 
     // read data from pbFile2 to a buffer
     char *dataBuff2 = new char[BUFF_SIZE];
@@ -57,16 +66,22 @@ int main(int argc, char **argv) {
     // compare dataBuff1 with dataBuff2
     if (0 != memcmp(dataBuff1, dataBuff2, dataSize2)) {
         fprintf(stderr, "Error: dataBuff1 != dataBuff2\n");
+        delete[] dataBuff1;
+        delete[] dataBuff2;
         return 1;
     }
 
     // write data from a buffer to a binary file
     if (nullptr == (fp = fopen(argv[2], "wb"))) {
         fprintf(stderr, "Error: cannot open file: '%s'\n", argv[2]);
+        delete[] dataBuff1;
+        delete[] dataBuff2;
         return 1;
     }
     fwrite(dataBuff2, sizeof(char), dataSize2, fp);
     fclose(fp);
 
+    delete[] dataBuff1;
+    delete[] dataBuff2;
     return 0;
 }