摘要: #includeint main(void){ double r,s; printf("r"); scanf("%lf",&r); if(r0){ s=3.1415926*r*r; } printf("f=%.7f\n",s); return 0;} 阅读全文
posted @ 2013-10-14 09:07 huangsilinlana 阅读(81) 评论(0) 推荐(0)