Compilare: user.c: In function ‘main’: user.c:95:32: warning: unused variable ‘yy’ [-Wunused-variable] int x = x1, xx = x2, y = y1, yy = y2; ^ user.c:95:15: warning: unused variable ‘xx’ [-Wunused-variable] int x = x1, xx = x2, y = y1, yy = y2; ^ user.c:78:19: warning: unused variable ‘more’ [-Wunused-variable] int i, less = 0, more = 0; ^ user.c:78:9: warning: unused variable ‘less’ [-Wunused-variable] int i, less = 0, more = 0; ^ user.c:82:8: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &N); ^ user.c:85:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d %d", &P[i].x, &P[i].y); ^ user.c:92:8: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &M); ^ user.c:94:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d %d %d %d", &x1, &y1, &x2, &y2); ^