[stl][复习]string, list容器和迭代器的复习
本帖最后由 小可爱～ 于 2017-1-28 16:31 编辑#define_CRT_SECURE_NO_WARNINGS
#define _SCL_SECURE_NO_WARNINGS
#include <iostream>
using namespace std;
#include <string>
#include <algorithm> //算法的头文件
int main11()
{
string s1("aaa");
string s2 = "bbb";
string s3 = s2 + "ccc";
string s4(10, 'a');
cout << s1 << endl;
cout << s2 << endl;
cout << s3 << endl;
cout << s4 << endl;
return 0;
}
//遍历string的元素
int main12()
{
string s1 = "abcdefg";
//1 数组模式
for (int i = 0; i < s1.length(); i++)
{
cout << s1 << "";
}
cout << endl;
//2 迭代器
for (string::iterator it = s1.begin(); s1.end() != it; it++)
{
cout << *it << "";
}
cout << endl;
//3 用 at 的方法获取元素
try
{
for (int i = 0; i < s1.length(); i++)
{
cout << s1.at(i) << "";
}
}
catch (char c)
{
cout << c << endl;
}
catch (...)
{
cout << "发生异常" << endl;
}
cout << endl;
return 0;
}
int main13()
{
string s = "abcd";
//1
printf("%s\n", s.c_str());
//2
printf("%s\n", s.data());
//3 内容拷贝
char buf;
//copy 参数一 数组, 参数二 copy几个 参数三 第几个位置拷贝开始
//不拷贝'\0'
s.copy(buf, 2, 1);
buf = '\0';
cout << "buf: " << buf << endl;
return 0;
}
//string 字符串的链接
int main14()
{
string s1 = "aaa";
string s2 = "bbb";
string s3 = s1 + s2;
cout << s3 << endl;
string s4 = "111";
string s5 = "222";
//添加类似于 strcat
s4.append(s5);
cout << s4 << endl;
return 0;
}
int main15()
{
string s1 = "aaa, bbb, ccc, ddd, bbb, fff, ddd, bbb, yyy, bbb";
int sVal = 0;
//find 查找 参数一的字符串 , 参数二是第几个位置
sVal = s1.find("bbb", sVal);
while (sVal != string::npos)
{
cout << sVal << endl;
sVal = sVal + 1;
sVal = s1.find("bbb", sVal);
}
sVal = s1.find("bbb", 0);
while (sVal != string::npos)
{
//替换 参数一第几个位置参数二 替换几个 参数三替换成什么
s1.replace(sVal, 3, "vvv");
sVal = sVal + 1;
sVal = s1.find("bbb", sVal);
}
return 0;
}
//string 区间删除
int main16()
{
string s1 = "hello1 hello2 hell3, hello4";
//找打这个迭代器 把这个迭代器所值的位置删除
string::iterator it = find(s1.begin(), s1.end(), 'l');
if (it != s1.end())
{
//删除迭代器所指的位置
s1.erase(it);
}
cout << "erase success ? -- " << s1 << endl;
return 0;
}
//插入字符串
int main17()
{
string s1 = "cdefgh";
//size_type 是 int 类型 一般存放位置 elEm *Pr一般存放指针
s1.insert(0, "ab");
//s1.insert(0, "ab", 2);
cout << s1 << endl;
return 0;
}
int main(int argv, char *args[])
{
int ret = 0;
//main11();
//main12();
//main13();
//main14();
//main15();
//main16();
main17();
system("pause");
return ret;
}
#include <iostream>
using namespace std;
#include <list>
void main()
{
list<int > List; //定义一个链表
//cout << "大小:" << List.size() << endl;//定义后的初始长度为 0
for (int i = 0; i < 10; i++)
{
List.push_back(i + 1);
}
cout << "大小:" << List.size() << endl;
list<int>::iterator it = List.begin();
it++;
it++;
it++;
List.insert(it, 1000);
it = List.begin();
while (it != List.end())
{
cout << *it++ << endl;
}
cout << "sort" << endl;
List.sort();
it = List.begin();
while (it != List.end())
{
cout << *it++ << endl;
}
for (list<int>::iterator p = List.begin(); p != List.end(); p++)
{
cout << *p << endl;
}
system("pause");
} 来看看。学习了
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