你会如何转换一个字符串,比方说:
string Numbers = "0.3 5.7 9.8 6.2 0.54 6.3";
转换成float数组,如:float Numbers[6] = {0.3, 5.7, 9.8, 6.2, 0.54, 6.3};
?
最佳答案
我会使用来自 std::
的数据结构和算法:
#include <string>
#include <vector>
#include <algorithm>
#include <iterator>
#include <iostream>
#include <cassert>
#include <sstream>
int main () {
std::string Numbers = "0.3 5.7 9.8 6.2 0.54 6.3";
// If possible, always prefer std::vector to naked array
std::vector<float> v;
// Build an istream that holds the input string
std::istringstream iss(Numbers);
// Iterate over the istream, using >> to grab floats
// and push_back to store them in the vector
std::copy(std::istream_iterator<float>(iss),
std::istream_iterator<float>(),
std::back_inserter(v));
// Put the result on standard out
std::copy(v.begin(), v.end(),
std::ostream_iterator<float>(std::cout, ", "));
std::cout << "\n";
}
关于c++ - 如何将字符串转换为 float 数组?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/9986091/