c programming language ___ 5_2.c

 #include <stdio.h>
 #include <ctype.h>
 #define  BUG printf("here!bug!\n");

 int getfloat(float *pn){
     int c;
     int t;
     int intbeforepoint=;
     int intafterpoint=;
     int intafterpoint_lenth=;
     int inte;
     int sign,esign;
     int ppoint;  // 1 means there have point ,otherwise no
     float res=;

     while( isspace(c=getch()) )
         ;
     if(!isdigit(c)&&c!=EOF&&c!='+'&&c!='-'){
         ungetch();
         return ;
     }
     sign=(c=='-')?-:;
     if(c=='+'||c=='-')
         c=getch();
     for(intbeforepoint=;isdigit(c);c=getch())
         intbeforepoint=*intbeforepoint+(c-'');
     ppoint=;
     if(c=='.'){
         ppoint=;
         c=getch();
         for(intafterpoint=;isdigit(c);c=getch()){
             intafterpoint=*intafterpoint+(c-'');
             intafterpoint_lenth++;
         }
         t=intafterpoint;
         while(t%==){
             intafterpoint_lenth--;
             t=t/;
         }
     }
     if(c=='e'||c=='E'){
         c=getch();
         esign=;
         if(c=='+'||c=='-'){
             esign= (c=='+')?:-;
             c=getch();
         }
         while( c==''){
             c=getch();
         }
         for(inte=;isdigit(c);c=getch())
             inte=*inte+(c-'');
     }
     BUG;
     if(c!=EOF)
         ungetch(c);
     res=1.0*intbeforepoint;
     t=intafterpoint_lenth;
     while(t--)
         res*=;
     res+=intafterpoint;
     t=intafterpoint_lenth;
     while(t--)
         res/=;
     if(esign==-){
         while(inte--)
             res/=;
     }else if(esign==){
         while(inte--)
             res*=;
     }
     res*=sign;
     *pn=res;
     printf("intbeforepoint=%d\n",intbeforepoint);
     printf("intafterpoint=%d\n",intafterpoint);
     printf("inte=%d\n",inte);
     printf("length=%d\n",intafterpoint_lenth);
     return c;
 }
 int main(){
     float num[];
     int i;
     for(i=;i<;++i){
         getfloat(&num[i]);
         printf("%lf\n",num[i]);
     }
     return ;
 }

5_2.c