#define _CRT_SECURE_NO_WARNINGS 1//找到数组中，只出现一次的数字#include<stdio.h>#include<limits.h>int main(){ int arr[] = { 1,2,3,4,5,1,2,3,4}; 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("找到单个数字：%d\n", arr[i]); break; } } return 0;}