Compilare: user.c: In function ‘main’: user.c:31:5: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d" ,&n); ^~~~~~~~~~~~~~~~~~~~~ user.c:33:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d" ,&v[i][0],&v[i][1]); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~