Question

#include <iostream>using namespace std;
const int LIMIT=10;
int main () {
  float counter;
  int number=0;
  int zeros=0;
  int odds=0;
  int evens=0;
  cout << "Please enter " << LIMIT << " integers, " << "positive, negative, or zeros." << endl;
  cout << "The numbers you entered are:" << endl;
  for (counter=1;      counter <=LIMIT;      counter++) {
    cin>>number;
    switch (number / 2) {
      case 0: evens++;
      if (number=0) zeros++;
      case 1: case -1: odds++;
    }
  }
  cout << endl;
  cout << "There are " << evens << " evens, " << "which includes " << zeros << " zeros." << endl;
  cout << "The number of odd numbers is: " << odds << endl;
  return 0;
}

大家好，

我有一个校队问题让我整天难过。我需要修改上面的脚本，允许我输入10个变量整数，程序必须返回偶数的总数，奇数的总数和零的总数。

我尝试了多种解决方案，包括（编号％2 == 0），以便让我的案例在我的switch参数下运行，但是我遗漏了一些东西。

请有人协助我推动我走上正确的道路。

（我知道我需要删除否定的情况，但我想发布原始代码，因为我拿出一些东西或者修改一些需要的东西）

Answer 1

#include <iostream>using namespace std;
const int LIMIT=10;
int main () {
  float counter;
  int number=0;
  int zeros=0;
  int odds=0;
  int evens=0;
  int n=0;
  cout << "Please enter " << LIMIT << " integers, " << "positive, negative, or zeros." << endl;
  cout << "The numbers you entered are:" << endl;
  for (counter=1;
  counter <=LIMIT;
  counter++) {
    cin>>number;
    n=(number%2);
    switch (n) {
      case 0: evens++;
      if (number==0) zeros++;
      break;
      case 1: odds++;
    }
  }
  cout << endl;
  cout << "There are " << evens << " evens, " << "which includes " << zeros << " zeros." << endl;
  cout << "The number of odd numbers is: " << odds << endl;
  return 0;
}

感谢papagaga设法让它工作 - 我觉得我太累了:)。

Answer 2

std::vector<int> myvec = {0, 2, 3, 5, 0, 0, 5, 4, 9};
std::vector<int> zeros;
std::vector<int> evens;
std::vector<int> odds;

for (auto i : myvec) {
    if (i % 2 == 0) {
        if (i == 0) zeros.push_back(i);
        else evens.push_back(i);
    }

    else
        odds.push_back(i);
}

std::cout << zeros.size();
std::cout << evens.size();
std::cout << odds.size();

return 0;
}

如果你不希望零在evens向量中，这将有效。

创建一个程序，计算奇数，偶数和零数C ++的数量

2 个答案: