# include<stdio.h>
void main()
{
    int toi( char *pcString )
    {
        int wint=0;
        for (;*pcString>='0'&&*pcString<='9';pcString++)
            {
                wint=10*wint+(*pcString-'0');
            }
        return wint;
    }
    char *s;
    int t;
    *s='3';
    t=toi(s);
    printf("%d",t);
}

# include<stdio.h>
 void main()
 {
     int toi( char *pcString )
     {
         int wint=0;
         for (;*pcString>='0'&&*pcString<='9';pcString++)
             {
                 wint=10*wint+(*pcString-'0');
             }
         return wint;
     }
     char *s;
     int t;
     *s='3';
     t=toi(s);
     printf("%d",t);
 }

  而且：
       main()函数前居然也没有声明子函数！

# include<stdio.h>
 void main()
 {
     int toi( char *pcString )
     {
         int wint=0;
         for (;*pcString>='0'&&*pcString<='9';pcString++)
             {
                 wint=10*wint+(*pcString-'0');
             }
         return wint;
     }
     char *s;
     int t;
     *s='3';
     t=toi(s);
     printf("%d",t);
 }

  而且：
       main()函数前居然也没有声明子函数！

一个比一个猛，都回去从第一章重新学