华为oj之字符串反转

输入N个字符

输出该字符串反转后的字符串

abcd

dcba

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

int main()
{
    string str;
    string out;
    while(getline(cin, str))
    {
        reverse(str.begin(), str.end());  // 原址逆序
        cout<<str<<endl;
    }
    return 0;
}

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

void strrev(char s[])
{
    int length = strlen(s) ;
    char ch;
    int i, j;

    for (i = 0, j = length - 1; i < j; i++, j--)
    {
        ch= s[i];
        s[i] = s[j];
        s[j] = ch;
    }
}

int main()
{
    char str[1000];
    while(scanf("%s", str) != EOF)
    {
        strrev(str);
        cout<<str<<endl;
    }        
    return 0;
}