单选题 下列程序的输出结果是______。
#include＜iostream.h＞
void main()
{char*str="12123434";
int x1=0,x2=0,x3=0,x4=0,i;
for(i=0;str[i]!="/0";i++)
switch (str[il)
{ case"1":x4++;
case"2":x3++;
case"3":x2++;
case"4":x1++;
}
cout＜＜x1＜＜","＜＜x2＜＜","＜＜x3＜＜","＜＜x4;
}