Compilare: user.cpp: In function ‘int main()’: user.cpp:71:39: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] &n,&m,&c,&r,&x,&y,&z,&w,&u); ^ user.cpp:77:55: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(int j=0;j<m;++j) fscanf(fin,"%llu",&mat[0][j]);//fin>>mat[0][j]; ^ user.cpp:78:55: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(int i=1;i<n;++i) fscanf(fin,"%llu",&mat[i][0]);//fin>>mat[i][0]; ^