写一个删除字符串1中包含字符串2程序

 

#include <iostream>
using std::cout;
using std::endl;
char *delstr(char*a,char*b)
{
  char*st=a,*s2,*s1;
while (*st&&*b)
{ 
s1=st;
s2=b;
while (*s1&&*s2&&!(*s1-*s2))
    s1++,s2++;
  if (!*s2)
    {
    while (*st++=*s1++);
    st=a;
   //st-=1;
    }
 st++;
}
return (a);
}
                       
int main()
{
 char a[]="dbcnnnabbcdrrrbcfffbc";
 cout<<delstr(a," ");
system("pause");
 return 0;
}

删除中间前后组成的b保留

char *delstr(char*a,char*b)
{
	char*st=a,*s2,*s1;
	int n=0;
	bool bl=1;
	while (*st&&*b)
	{ 
		
		s1=st;
		s2=b;
		while (*s1&&*s2&&!(*s1-*s2))
			s1++,s2++;
		if (!*s2)
		{
			while (*st++=*s1++);    
			st=a+n;
		}
	n++; 
	st++;
	}
	return (a);
}