Compilare: main.c: In function 'main': main.c:216:21: warning: format '%d' expects argument of type 'int', but argument 3 has type 'LLU {aka long long unsigned int}' [-Wformat=] fprintf(fout, "%d\n", Huffman(tree, &pureQueue, &lastElementPureQueue, &mergedQueue, &lastElementMergedQueue, n)); ^ main.c:200:5: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &n); ^~~~~~~~~~~~~~~~~~~~~ main.c:211:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%llu", &queueNode->occurences); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~