📄 关于用c++实现计算器的一点提示 - 放飞技术网.mht
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Date: Thu, 2 Dec 2004 16:22:13 +0800
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<TD class=3Darcontent=20
=
colSpan=3D3><BR>=B1=BE=D5=BE=D4=AD=B4=B4=A3=BA=B6=B9=B6=B9=C1=FA<BR> =
; =BD=FC=C8=D5=C4=B3=CE=BB=BC=C6=CB=E3=BB=FA=D1=A7=D4=BA=
=B5=C4=C0=CF=CA=A6=B3=F6=C1=CB=D2=BB=B5=C0=D3=C3C++=CA=B5=CF=D6=BC=C6=CB=E3=
=C6=F7=B9=A6=C4=DC=B5=C4=C9=CF=BB=FA=CC=E2=D3=C9=D3=DA=B1=BE=CC=E2=D2=AA=C4=
=DC=B9=BB=CA=B9=D3=C3=B1=ED=B4=EF=CA=BD=BC=C6=CB=E3=A1=A3=CA=B9=CD=AC=D1=A7=
=C3=C7=C9=F5=CE=AA=BF=E0=C4=D5=A1=A3=D5=E2=C0=EF=B1=BE=C8=CB=CE=AA=B4=F3=BC=
=D2=D7=F6=D2=BB=D0=A9=CC=E1=CA=BE=A1=A3<BR>=D2=BB=A1=A2=B9=D8=D3=DA=CA=E4=
=C8=EB=B1=ED=B4=EF=CA=BD=BC=C6=CB=E3=B5=C4=CA=FD=BE=DD=BD=E1=B9=B9=CA=B5=CF=
=D6=B7=BD=B7=A8=D3=D0=C1=BD=D6=D6=A3=BA<BR>1.=20
=
=CB=AB=CA=FD=D7=E9=C4=E6=B2=A8=C0=BC=B1=ED=B4=EF=CA=BD=B7=A8<BR>2.=20
=
=B6=FE=B2=E5=CA=F7=B7=A8<BR> =D5=E2=C0=EF=BD=F4=BD=
=E9=C9=DC=CB=AB=CA=FD=D7=E9=C4=E6=B2=A8=C0=BC=B1=ED=B4=EF=CA=BD=B7=A8=A3=BA=
<BR>=BC=FB=D4=B4=B3=CC=A3=A8c=D3=EF=D1=D4=A3=A9=A3=BA<BR><BR>#include=20
"stdio.h"<BR>#define m0 100<BR><BR>void main(){<BR><BR>char=20
str[m0];<BR>char exp[m0];<BR>char stack[m0];<BR>float=20
stack1[m0],d;<BR>char ch,c;<BR>int=20
=
i,j,t,top=3D0;<BR>i=3D0;<BR><BR>clrscr();<BR>do<BR>{<BR>  =
; i++;<BR> scanf("%c",&str[i]);<BR>}while=
=20
=
(str[i]!=3D=A1=AF#=A1=AF&&i!=3Dm0);<BR>t=3D1;<BR>i=3D1;<BR>ch=3Ds=
tr[i];<BR>i++;<BR>while(ch!=3D=A1=AF#=A1=AF)<BR>{<BR> &n=
bsp;if(ch>=3D=A1=AF0=A1=AF&&ch<=3D=A1=AF9=A1=AF)<BR> &=
nbsp; {<BR> exp=
[t]=3Dch;<BR> t++;<BR>&nbs=
p; }<BR> else<BR> &nbs=
p; if(ch=3D=3D=A1=AF(=A1=AF)<BR> {<BR> &=
nbsp; top++;<BR> &nbs=
p; stack[top]=3Dch;<BR> }<B=
R> else<BR> if(ch=3D=3D=A1=AF=
)=A1=AF)<BR> {<BR> &n=
bsp; while(stack[top]!=3D=A1=AF(=A1=AF)<BR> &=
nbsp; {<BR> &nb=
sp; exp[t]=3Dstack[top];<BR> &nbs=
p; top--;<BR> &=
nbsp; t++;<BR>=
}<BR> &n=
bsp; top--;<BR> }<BR> =
else<BR> if=20
=
(ch=3D=3D=A1=AF+=A1=AF||ch=3D=3D=A1=AF-=A1=AF)<BR>  =
;{<BR> while(top!=3D0&=
&stack[top]!=3D=A1=AF(=A1=AF)<BR> =
{<BR> &n=
bsp; exp[t]=3Dstack[top];<BR> &nb=
sp; top--;<BR> =
t++;<BR>  =
; }<BR> &=
nbsp; top++;<BR> stac=
k[top]=3Dch;<BR> }<BR> else=
<BR> if(ch=3D=3D=A1=AF*=A1=AF||ch=3D=3D=A1=AF/=A1=AF=
)<BR> {<BR> &nb=
sp; while(stack[top]=3D=3D=A1=AF*=A1=AF||stack[top]=3D=3D=A1=AF/=A1=AF=
)<BR> {<BR> &nb=
sp; exp[t]=3Dstack[t=
op];<BR>  =
; top--;<BR> &n=
bsp; t++;<BR> }=
<BR> top++;<BR>  =
; stack[top]=3Dch;<BR> &nbs=
p; }<BR> ch=3Dstr[i];<BR> &n=
bsp;i++;<BR>}<BR>while(top!=3D0)<BR>{<BR> exp[t]=3D=
stack[top];<BR> t++;<BR> to=
p--;<BR>}<BR>exp[t]=3D=A1=AF#=A1=AF;<BR>for(j=3D1;j<=3Dt;j++)printf("%=
c",exp[j]);<BR>printf("\n");<BR>exp[t+1]=3D=A1=AF\0=A1=AF;<BR>t=3D1;<BR>t=
op=3D0;<BR>c=3Dexp[t];<BR>t++;<BR>while(c!=3D=A1=AF#=A1=AF)<BR>{<BR> =
; if(c>=3D=A1=AF0=A1=AF&&c<=3D=A1=AF9=A1=AF=
)<BR> {<BR> &nb=
sp; d=3Dc-=A1=AF0=A1=AF;<BR> &nbs=
p; top++;<BR> stack1[=
top]=3Dd;<BR> }<BR> else<BR=
> {<BR> &=
nbsp;switch=20
=
(c)<BR> {<BR> &=
nbsp; case=20
=
=A1=AF+=A1=AF:stack1[top-1]=3Dstack1[top-1]+stack1[top];break;<BR> &=
nbsp; case=20
=
=A1=AF-=A1=AF:stack1[top-1]=3Dstack1[top-1]-stack1[top];break;<BR> &=
nbsp; case=20
=
=A1=AF*=A1=AF:stack1[top-1]=3Dstack1[top-1]*stack1[top];break;<BR> &=
nbsp; case=20
=A1=AF/=A1=AF:=20
=
<BR> &nb=
sp; if(stack1[top]!=3D0)<BR> &nbs=
p;  =
; stack1[top-1]=3Dstack1[top-1]/stack1[top];<BR>&n=
bsp; &nb=
sp; else<BR> &n=
bsp; &nb=
sp;printf("ERROR!!!=20
Zero can not be=20
=
divided.\n");<BR> &n=
bsp; getch();<=
BR> &nbs=
p; exit(0);<BR>  =
; }<BR> &=
nbsp; top--;<BR> }<BR>  =
; c=3Dexp[t];<BR> t++;<BR>}<BR>printf("The=20
mark is %g",stack1[top]);<BR>getch();<BR>}=20
=
<BR>=C0=FD=A3=BA<BR>=CA=E4=C8=EB=A3=BA1+2=A1=C1=A3=A84+6=A3=A9#=A3=BB<BR>=
=B3=CC=D0=F2=BD=AB=CA=FD=BE=DD=D7=AA=BB=BB=CE=AA=D6=D0=D0=F2=A3=AC=D4=D9=CA=
=E4=B3=F6=A3=BA1246+*+#=A3=BB<BR>=D4=D9=BC=C6=CB=E3=A1=A3<BR>=CA=E4=B3=F6=
21=A1=A3<BR><BR><BR>=B6=FE=A1=A2=B9=D8=D3=DA=B7=D6=CA=FD=B5=C4=BC=C6=CB=E3=
<BR> =D5=E2=C0=EF=BD=F6=BD=E9=C9=DC=B7=BD=B7=A8=A3=
=BA<BR>=B0=B4=D7=D6=B7=FB=D0=CD=CA=E4=C8=EB=CA=FD=BE=DD=A1=A3=B0=D1=B7=D6=
=D7=D3=B7=D6=C4=B8=B7=D6=B1=F0=B8=B6=D6=B5=B8=F8=C1=BD=B8=F6=B2=BB=CD=AC=B5=
=C4=B1=E4=C1=BF=A1=A3<BR>=C8=E73/4+5/5<BR>=CF=C8=B7=D6=C4=B8=C7=F3=D7=EE=D0=
=A1=B9=AB=B1=B6=CA=FD=CE=AA20=A3=AC=D4=D9=B7=D6=B1=F0=C7=F3=D7=EE=D0=A1=B9=
=AB=B1=B6=CA=FD=B6=D4=B7=D6=C4=B8=B5=C4=D6=CA=D2=F2=CA=FD4=CE=AA5=A3=AC5=CE=
=AA4=A3=AC=D4=D9=B0=D1=D5=E2=D0=A9=C7=F3=B3=F6=B5=C4=D6=CA=D2=F2=CA=FD=B7=
=D6=B1=F0=B3=CB=B8=F8=B7=D6=D7=D3=A1=A3=D4=D9=B7=D6=D7=D3=CF=E0=BC=D3=A1=A3=
3=A1=C15=A3=AB5=A1=C14=A3=BD15=A3=AB20=A3=BD35=A1=A3=D4=D9=C7=F3=B7=D6=D7=
=D335=D3=EB=B7=D6=C4=B8=B5=C4=D7=EE=D0=A1=B9=AB=B1=B6=CA=FD=B5=C4=D7=EE=B4=
=F3=B9=AB=D4=BC=CA=FD=A1=A3=CE=AA5=A1=A3=B7=D6=D7=D3=A1=A2=B7=D6=C4=B8=CD=
=AC=B3=FD=D7=EE=B4=F3=B9=AB=D4=BC=CA=FD=D4=D9=CA=E4=B3=F6=CE=AA7/4=A1=A3<=
BR>=D5=E2=C0=EF=B8=B6=CA=B5=CF=D6=D7=EE=D0=A1=B9=AB=B1=B6=CA=FD=A1=A2=D7=EE=
=B4=F3=B9=AB=D4=BC=CA=FD=B5=C4=CB=E3=B7=A8=B3=CC=D0=F2=A3=A8c++=A3=A9<BR>=
#include<iostream.h><BR>void=20
main()<BR>{<BR> int=20
=
a,b;<BR> cin>>a>>b;<BR> &nb=
sp; int=20
=
i,j,k,m,n,q,jilu;<BR> m=3Da>b?b:a;<BR> &nb=
sp; n=3Da>b?a:b;<BR> for=20
=
(i=3D1;i<=3Dm;i++)<BR> if(a%i=3D=3D0&&b=
%i=3D=3D0)<BR> j=3Di;//=C7=F3=D7=EE=B4=F3=B9=AB=D4=
=BC=CA=FD<BR> for=20
=
(i=3D1;i<=3Dm;i++)<BR> {<BR> &=
nbsp; k=3Dn*i;<BR> &n=
bsp; for=20
=
(q=3D1;q<=3Dn;q++)<BR> =
{<BR> &n=
bsp;if=20
(m*q=3D=3Dk) {jilu=3Dm*q;goto=20
=
end;}<BR> &nbs=
p; if=20
(m*q>k)=20
=
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