#define _CRT_SECURE_NO_WARNINGS 1
#include <stdio.h>
int main()
{
int arr[]={1,2,3,4,5,1,2,3,7,4,5};
int i = 0;
int sz = sizeof(arr)/sizeof(arr[0]);
for (i=0; i<sz; i++)
{
int count = 0;
int j = 0;
for (j = 0;j<sz; j++)
{
if(arr[i] == arr[j])
{
count++;
}
}
if(count == 1)
{
printf("单身狗：%d\n",arr[i]);
break;
}
}
return 0;
}
