Compilare: user.cpp: In function ‘int main()’: user.cpp:253:56: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘long long int’ [-Wformat=] printf("%I64d %d %I64d\n", pal[i].key, val, cat); ^ user.cpp:253:56: warning: format ‘%d’ expects argument of type ‘int’, but argument 4 has type ‘long long int’ [-Wformat=] user.cpp: In function ‘char nextch()’: user.cpp:16:63: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] if (pos == BUF_SIZE) fread(buf, BUF_SIZE, 1, fin), pos = 0; ^