Compilare: user.c: In function ‘main’: user.c:51:3: warning: implicit declaration of function ‘time’ [-Wimplicit-function-declaration] srand( time(0) ); ^ user.c:41:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d", &N ); ^ user.c:44:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d%d", &v[i].x, &v[i].y ); ^