我想制作表示 myvec 中元素频率的 vector (mycount)。你能告诉我哪里出了问题吗?
#include <iostream>
#include <vector>
#include <cstdlib>
#include <functional>
#include <algorithm>
using namespace std;
int main() {
int num;
cout << "How many numbers do you want to read in?" << endl;
cin >> num;
vector<int> myvec(num);
std::generate(myvec.begin(), myvec.end(), []()->int {return rand(); });
for (int i = 0; i < num; ++i) {
vector<int> mycount[i] = count(myvec.begin(), myvec.end(), myvec[i]);
cout << mycount[i] << endl;
}
return 0;
}
最佳答案
我怀疑你打算使用:
vector<int> myvec(num);
// Create a vector for storing the counts as well.
vector<int> mycount(num);
std::generate(myvec.begin(), myvec.end(), []()->int {return rand(); });
for (int i = 0; i < num; ++i) {
// Get the counts of the element at this index and store it.
mycount[i] = count(myvec.begin(), myvec.end(), myvec[i]);
cout << mycount[i] << endl;
}
关于c++ - 我不明白为什么 for-loop 不适用于此代码,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/33176149/