在 C++ 中反转字符串中的单词 II
假设我们有一个输入字符串,我们必须逐字反转字符串。
因此,如果输入为 ["t","h","e"," ","m","a","n"," ","i","s"," ","n","l","c","e"],则输出将为 ["n","l","c","e"," ","i","s"," ","m","a","n"," ","t","h","e"]
要解决这个问题,我们将遵循以下步骤 -
反转数组 s
j := 0
n := s 的大小
对初始化 i := 0 时,当 i < n 时,更新(将 i 递增 1),执行 -
如果 s[i] 与 ' ' 相同,则 -
反转从索引 j 到 i 的数组 s
j := i + 1
反转从索引 j 到 n 的数组 s
示例
让我们看以下实施,以获得更好的理解 -
#include <bits/stdc++.h>
using namespace std;
void print_vector(vector<auto< v){
cout << "[";
for(int i = 0; i<v.size(); i++){
cout << v[i] << ", ";
}
cout << "]"<<endl;
}
class Solution {
public:
void reverseWords(vector<char>& s) {
reverse(s.begin(), s.end());
int j = 0;
int n = s.size();
for(int i = 0; i < n; i++){
if(s[i] == ' '){
reverse(s.begin() + j, s.begin() + i);
j = i + 1;
}
}
reverse(s.begin() + j, s.begin() + n);
}
};
main(){
Solution ob;
vector<char> v = {'t','h','e',' ','m','a','n',' ','i','s',' ','n','i','c','e'};
ob.reverseWords(v);
print_vector(v);
}输入
{'t','h','e',' ','m','a','n',' ','i','s',' ','n','i','c','e'}输出
[n, i, c, e, , i, s, , m, a, n, , t, h, e, ]
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