Compilare: user.cpp: In function ‘int main()’: user.cpp:109:31: 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,buff_size,f1); ^ user.cpp: In function ‘void citeste(int&)’: user.cpp:19:25: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] buff_poz = 0; ^ user.cpp:27:25: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] buff_poz = 0; ^ user.cpp: In function ‘int main()’: user.cpp:130:16: warning: ‘x2’ may be used uninitialized in this function [-Wmaybe-uninitialized] int sol,x1,x2,aux; ^ user.cpp:154:18: warning: ‘x1’ may be used uninitialized in this function [-Wmaybe-uninitialized] else if(x == x1 && y < x2) ^