Compilare: user.cpp: In function ‘int main()’: user.cpp:62:20: warning: format ‘%ld’ expects argument of type ‘long int*’, but argument 2 has type ‘var* {aka long long int*}’ [-Wformat=] scanf("%ld", &n); ^ user.cpp:65:27: warning: format ‘%ld’ expects argument of type ‘long int*’, but argument 2 has type ‘var* {aka long long int*}’ [-Wformat=] scanf("%ld", &V[i]); ^ user.cpp:94:24: warning: format ‘%ld’ expects argument of type ‘long int’, but argument 2 has type ‘var {aka long long int}’ [-Wformat=] printf("%ld\n", sum); ^ user.cpp:98:41: warning: format ‘%ld’ expects argument of type ‘long int’, but argument 2 has type ‘int’ [-Wformat=] printf("%ld %ld\n", D[i], BIT[i]); ^ user.cpp:98:41: warning: format ‘%ld’ expects argument of type ‘long int’, but argument 3 has type ‘var {aka long long int}’ [-Wformat=] user.cpp:60:12: warning: unused variable ‘v’ [-Wunused-variable] var n, v; ^ user.cpp:57:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("huffman.in", "r", stdin); ^ user.cpp:58:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("huffman.out","w",stdout); ^ user.cpp:62:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld", &n); ^ user.cpp:65:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld", &V[i]); ^