Compilare: user.c: In function ‘main’: user.c:56:5: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d" ,&n,&k); ^~~~~~~~~~~~~~~~~~~~~~~~~~ user.c:60:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d" ,&v[i][0]); ^~~~~~~~~~~~~~~~~~~~~~~~~~~ user.c:63:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d" ,&v[i][1]); ^~~~~~~~~~~~~~~~~~~~~~~~~~~