Compilare: user.cpp: In function ‘int main()’: user.cpp:38:47: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%lld%lld%lld%lld",&N,&M,&C,&R); ^ user.cpp:39:54: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%lld%lld%lld%lld%lld",&X,&Y,&Z,&W,&U); ^ user.cpp:40:52: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(i=1; i<=M; ++i) fscanf(fin,"%lld",&A[1][i]); ^ user.cpp:41:52: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(i=2; i<=N; ++i) fscanf(fin,"%lld",&A[i][1]); ^