2018-05-21-2

一、python单词反转

list1 = "aaa bbb ccc"
list1 = list1.split()
###此时list1=["aaa","bbb","ccc"]###
list1 = list1[::-1]
###此时list1=["ccc","bbb","aaa"]###
list1 = " ".join(list1)
###此时list1="ccc bbb aaa"###
print(list1)
###输出ccc bbb aaa###

• join的另外使用方法

a='abcd'
a = ' '.join (a)  
###此时a='a b c d'###
a='abc edf degd'  
a = ' '.join (a)
###此时a='a b c   e d f   d e g d'### 

• join可以快速的再每个字符中间加上我们赋值的字符

a='abcedfdegd'
a ='+'.join (a)  
###此时a='a+b+c+ +e+d+f+ +d+e+g+d'###

二、C++单词反转

#include<iostream>
#include<string>
using namespace std;

int main(){
        string a[100];
        int i=0;
        while(cin>>a[i]){
                i++;
        }
        for(int x=i-1;x>=0;x--)
                cout<<a[x]<<" ";
        return 0;
}