#include "stdio.h"
#include "math.h"
#include "stdlib.h"
float zuizhongpmin(float x);
float zhengjiemian() ;
float diyilei();
void zhengjiemianfuhe();
void xiejiemian();
float b=180,h=1100,L=12600,r0=1.1,bf=1620,hf=120;
float fcd=13.8,ftd=1.39,fcuk=30,Sb=0.56,fsd=280,fsv=195;
float r0Md=968.74,Vd0=317.33,Vdz=67.08;
float pmin=0.002,psvmin=0.0018;
float as,h0,Asv;
float As;
main()
{