Compilare: user.cpp: In function ‘int main()’: user.cpp:43:33: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff, 1, 20000, stdin); ^ user.cpp: In function ‘void citire(short int&)’: user.cpp:20:41: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff, 1, 20000, stdin); ^ user.cpp:31:41: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff, 1, 20000, stdin); ^ user.cpp: In function ‘int main()’: user.cpp:87:21: warning: ‘S’ may be used uninitialized in this function [-Wmaybe-uninitialized] if (k != j) ^