第一題
char *ptr=dest;
while ( *ptr++ != '\0' );
       ptr--;

while ( (*ptr++=*source++) != '\0' );
       return dest;

 


第二題
char *s=source,*target,*ptr;

while ( *s != '\0' ) 
{
       ptr = s;

       t = target;

       while ( *t != '\0' && *ptr == *t )
       {
              ptr++; 
              t++;
       }
       
       if ( *t == '\0' ) return s;
           s++;
}

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