# i nclude<stdio.h> 9aYCU/3
# i nclude<stdio.h> Fb
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# i nclude<math.h> ^#p Su
#define PI 3.1415926
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void ydgl(); $D\SueZ
float d,am,ro,e,h,p,dt0,d0,s,ds,r,al; JT, 8/o
int f; T/UhZ4(V
main() ]xbR:CYJ
{ printf("Determaination the prime circle of cam\n"); }5FdX3YR
printf("----------------------------\n"); g.zJ[-
printf( "input ro=");scanf("%f",&ro); K6{{\r
printf("input h=");scanf("%f",&h); ^. M*pe
printf("input e=");scanf("%f",&e); vEOoG>'Zq
printf("input dt0=");scanf("%f",&dt0); o"J}@nF
am=0;p=PI/180; PL[7|_%
printf("The initial data:ro=%f\n",ro); v|"Nx42
printf("h=%f e=%f dt0=%f\n",h,e,dt0); ZWxq<&Cg
do +m]$P,yMt
{ro=ro+5; 7;+:J;xf66
for(f=0;f<=dt0;f=f+2) *dL!)+:d
{d=PI*f/dt0; sJ{NbN~`I
ydgl(); -!k"*P
} 8$BZbj%?hx
} =4 36/O`K
while(am>30*p); p{[Ol
printf("The intermediate results: am=%f\n",am/p); _ ^r KOd
printf("ro=%f\n",ro); A90oX1l
do eI/9uR%
{ro=ro-1; Re0ma%~LP
if(ro<e) udMDE=1~L
break; C2<!.l
bO^#RVH
for(f=0;f<=dt0;f=f+2) _jQ"_Ff
{d=PI*f/dt0; RU|{'zC\v
ydgl(); m(L]R(t
} 51u8.%{4
} TXWi5f[
while((am>30*p)||(am<=29.5*p)); M1^,g~e
printf("The final results:max alfa=%f\n",am/p); E9!u|&$S
printf(" min ro=%f\n",ro); 3i/$YX5@
getch(); Pq ZMuUd
} =X'i^Q
void ydgl() zB kS1qMn
{ d0=dt0*p; ?kqo~twJ
s=0.5*h*(1-cos(d)); ,b%T[s7
ds=0.5*h*PI*sin(d)/d0; I9-vV>:z
r=sqrt(ro*ro-e*e); 5zWxI]4d\
if((s+r)==0) hz\Fq1
return; hiZE8?0+~N
al=atan((ds-e)/(s+r)); N{U``LV
if(al>am) ( 6|S42
am=al; (iXo\y`z
}