Compilare: user.cpp: In function ‘int main()’: user.cpp:89:19: warning: narrowing conversion of ‘(x + -1)’ from ‘int’ to ‘short int’ inside { } [-Wnarrowing] v[++nr]={x-1,i_-1,j_,i,-1}; ^ user.cpp:89:24: warning: narrowing conversion of ‘(i_ + -1)’ from ‘int’ to ‘short int’ inside { } [-Wnarrowing] v[++nr]={x-1,i_-1,j_,i,-1}; ^ user.cpp:89:16: warning: narrowing conversion of ‘j_’ from ‘int’ to ‘short int’ inside { } [-Wnarrowing] v[++nr]={x-1,i_-1,j_,i,-1}; ^ user.cpp:89:16: warning: narrowing conversion of ‘i’ from ‘int’ to ‘short int’ inside { } [-Wnarrowing] user.cpp:90:16: warning: narrowing conversion of ‘y’ from ‘int’ to ‘short int’ inside { } [-Wnarrowing] v[++nr]={y,i_-1,j_,i,1}; ^ user.cpp:90:22: warning: narrowing conversion of ‘(i_ + -1)’ from ‘int’ to ‘short int’ inside { } [-Wnarrowing] v[++nr]={y,i_-1,j_,i,1}; ^ user.cpp:90:16: warning: narrowing conversion of ‘j_’ from ‘int’ to ‘short int’ inside { } [-Wnarrowing] v[++nr]={y,i_-1,j_,i,1}; ^ user.cpp:90:16: warning: narrowing conversion of ‘i’ from ‘int’ to ‘short int’ inside { } [-Wnarrowing] user.cpp: In member function ‘void InputReader::advance()’: user.cpp:39:51: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer, SIZE, 1, input_file); ^ user.cpp: In constructor ‘InputReader::InputReader(const char*)’: user.cpp:14:47: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer, SIZE, 1, input_file); ^