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我将以下数据写入文件。我想忽略开头的所有零以及从 181 开始的数组中的每个单元格中的每个数字，以便我可以轻松使用它。

我知道如何将数据放入数组中，但我怎么能忽略所有这些零？

0 177 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 181 98 1 2 28 0 104 93 165 3 7 110 239 5 172 164 176 29 56 147 4 0 234 215 3 0 166 6 0 0 78 5 0 0 164 145 181 708 1 1 2 58 110 239 5 172 164 176 29 56 147 4 0 234 215 3 0 169 6 0 0 78 5 0 0 0 147 117 181 98 1 2 28 0 56 101 165 3 7 110 239 5 172 164 176 176 29 56 56 56 147 40 234 4 0 234 234 234 234 215 3 3 0 173 6 0 0 81 5 0 0 134 109 181 98 1 2 28 0 32 105 165 3 7 110 239 5 172 164 176 29 56 147 4 0 234 215 3 0 181 6 9 1 0 85 7 181 0 0 85 7 181 0 2 28 0 8 109 165 3 7110 239 5 172 164 176 29 56 147 4 0 234 215 3 0 182 6 0 0 87 5 0 0 109 101

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2 回答 2

1

我不确定我是否理解你的问题，所以我会发布多个答案。选择与您的问题描述相符的一项。

案例1：忽略之前（或之前并包括）的所有内容181：

#include <iostream>
#include <fstream>
#include <vector>

int main() {
  std::ifstream in("input.txt");
  std::vector<int> vec;
  int reached_181 = 0, x;

  while(in >> x) {
    if(x == 181) reached_181 = 1;
    if(reached_181) vec.push_back(x);
    // if you also want to neglect 181 then just change the order of the two commands
    // if(reached_181) vec.push_back(x);
    // if(x == 181) reached_181 = 1;
  }

  for(std::vector<int>::size_type i=0; i<vec.size(); ++i) {
    std::cout << vec[i] << " ";
  }

  return 0;
}

案例2：忽略之前的每个零181

#include <iostream>
#include <fstream>
#include <vector>

int main() {
  std::ifstream in("input.txt");
  std::vector<int> vec;
  int reached_181 = 0, x;

  while(in >> x) {
    if(x == 181) reached_181 = 1;
    if(reached_181 || x) vec.push_back(x);
  }

  for(std::vector<int>::size_type i=0; i<vec.size(); ++i) {
    std::cout << vec[i] << " ";
  }

  return 0;
}

案例 3：忽略输入文件中的所有零

#include <iostream>
#include <fstream>
#include <vector>

int main() {
  std::ifstream in("input.txt");
  std::vector<int> vec;
  int x;

  while(in >> x) {
    if(x) vec.push_back(x);
  }

  for(std::vector<int>::size_type i=0; i<vec.size(); ++i) {
    std::cout << vec[i] << " ";
  }

  return 0;
}
于 2013-06-09T18:07:19.043 回答
0

尝试这个：

#include <fstream>
#include <vector>
#include <iostream>

int main()
{
    std::vector<int> v;
    std::fstream out("out.txt"); // name of your file
    bool hit;

    for (int n; (out >> n);)
    {
        if (n == 181 && !hit)
            hit = true;
        if (!hit)
            if (n)
                v.push_back(n);

        if (hit)
            v.push_back(n);
    }

    typedef std::vector<int>::const_iterator iter_type;

    for (iter_type it = v.begin(); it != v.end(); ++it)
        std::cout << *it << std::endl;

}
于 2013-06-09T17:14:09.917 回答