删除string中第一次出现的character，最后返回string.

#include <stdio.h>
#include <stdlib.h>

char *strdel(char *str, char ch)
{
   int i;
   int flag = 0;
   for (i=0; *(str+i)!='\0'; i++)
   {
    if (flag == 0)
    { if (*(str+i) == ch)
    { flag = 1;
      *(str+i) = *(str+i+1);
    }
    }
    else
      *(str+i) = *(str+i+1);
   }
  return str;
}
//---
int main()
{
   char list[]="abcdefg";
   printf("Result is %s \n", strdel(list, 'g'));
}