{
            mi=Mi(P,J);
            p=P/1000000;
            j=J;
        }   
        mi=Mi(P,J);
}
printf("P=%5.2f\tJ=%5.2f\tMi=%5.4f\tHouDu=%10.8f\n",
        p,j,mi,1.2*p*1000000*D/(2.3*YingLi+p*1000000));
for(P=5000000;P<=20000000;P+=100000)
{
    j=J=0.5;
    p=P/1000000;
     printf("P=%5.2f\tJ=%5.2f\tMi=%5.4f\tHouDu=%10.8f\n",
             p,j,mi=Mi(P,J),1.2*P*D/(2.3*YingLi+P));
    }
P=20000000;
HouDu=1.2*P*D/(2.3*YingLi+P);  
    printf("HouDu=%10.8f\n",HouDu); 
   printf("%f  %f\n",Mp,Mc); 
   scanf("*");
   return 0; 
} 227mm助推固体火箭发动机设计(7):http://www.751com.cn/jixie/lunwen_10314.html