C++ 计算数组和，平均值

#include <iostream>
using namespace std;
int main()
{
 int nums[]{ 1,2,3,4,5,6 };
 int numsLen = sizeof(nums) / sizeof(int);
 for (int i = 0; i < numsLen; i++) {
  cout << nums[i] << '\t';
 }
 cout << endl;
 int sum = 0;
 for (int i = 0; i < numsLen; i++){
  sum += nums[i];
 }
 cout << "数列的和为：" << sum << "\t平均值为：" << sum / numsLen << endl;
 system("pause");
 return 0;
}

计算数组中奇数偶数的个数，查找输入数字的下标：

#include <iostream>
using namespace std;
int main()
{
 int nums[]{ 1,2,3,4,5,6 };
 int numsLen = sizeof(nums) / sizeof(int);
 for (int i = 0; i < numsLen; i++) {
  cout << nums[i] << '\t';
 }
 cout << endl;
 int sum = 0;
 for (int i = 0; i < numsLen; i++){
  sum += nums[i];
 }
 cout << "数列的和为：" << sum << "\t平均值为：" << sum / numsLen << endl;
 int oNums = 0;
 int jNums = 0;
 for (int i = 0; i < numsLen; i++) {
  if (nums[i] % 2 == 0) {
   oNums++;
  }else {
   jNums++;
  }
 }
 cout << "奇数的个数：" << jNums << "\t偶数的个数：" << oNums << endl;
 int searchNum;
 int searchIndex = INT_MIN;
 cout << "请输入要查找的数字：";
 cin >> searchNum;
 for (int i = 0; i < numsLen; i++) {
  if (nums[i] == searchNum) {
   searchIndex = i;
   break;
  }
 }
 if (searchIndex == INT_MIN) {
  cout << "数组中没有这个数字！！！" << endl;
 }
 else {
  cout << searchNum << "在数组中的下标为：" << searchIndex << endl;
 }
 system("pause");
 return 0;
}