int main11()//用for实现
{
char *a="wqwqdadadadqeadafdsfewqew";
char *b="wq";
int i;
int icount=0;
// a=strstr(a,"wq");
for(;*a!=' ';)
{
//if(strstr(a,"wq")!=NULL)//这句不对的原因就是strstr自动查找的
a=strstr(a,"wq");//按这里来说strstr是自己自动查找的 这里如果不匹配返回NULL
if(a!=NULL)
{
icount++;
a=a+strlen("wq");
}
else//没有这个break还会致错！
break;
}
printf("%d
",icount);
system("pause");
}
int main22()//用while实现
{
char *a="wqwqdadadadqeadafdsfewqew";
char *b="wq";
int i;
int icount=0;
a=strstr(a,"wq");
while(a!=' ')
{
a=strstr(a,"wq");
if(a!=NULL)
{
icount++;
a=a+strlen("wq");
}
else//没有这个break还会致错！
break;
}
printf("%d
",icount);
a="wqwqdadadadqeadafdsfewqew";
icount=0;
while (a=strstr(a,b))//整个循环中直到a中不会再出现b的序列，则返回NULL
{
icount++;
a=a+strlen(b);
/*if(*a ==' ') 因此这步就是多余的
break;*/
}
printf("%d
",icount);
system("pause");
}
int main33()//用 do while实现
{
char *a="wqwqdadadadqeadafdsfewqew";
char *b="wq";
int i;
int icount=0;
do
{
icount++;
a=a+strlen(b);
}while(a=strstr(a,"wq"));
printf("%d
",icount);
system("pause");
}
//实现接口
int showT(char **mya,char ** myb)
{
char **Tmya=mya;
char **Tmyb=myb;
int icount=0;
while( *(Tmya)=strstr(*Tmya,*Tmyb) )
{
icount++;
*Tmya=*Tmya+strlen(*Tmyb);
}
return icount;
}
int main()
{
char *a="wqwqdadadadqeadafdsfewqew";
char *b="wq";
int i=0;
i=showT(&a,&b);
printf("%d
",i);
system("pause");
}
int shouT2(char *mya,char *myb,int *myicount)
{
char *Tmya=mya;
char *Tmyb=myb;
int *Tmyicount=myicount;
*myicount=0;
while( Tmya=strstr(Tmya,Tmyb) )
{
(*myicount)++;//这里导致错误，因为++ 和* 的优先级不同，++的优先级比*的高
Tmya=Tmya+strlen(Tmyb);
}
return *myicount;
}
int main()
{
char *a="wqwqdadadadqeadafdsfewqew";
//char b[]="wq";这里的b出来的是乱码，因为没有字符终止符
char *b="wq";
int i=0;
i=shouT2(a,b,&i);
printf("%d
",i);
system("pause");
}