字符串的相关操作

初始化

char str1[] = {"Le Chapon Dodu"};
string str2 = {"Le Chapon Dodu"};
char str3[20] = "jinan";

赋值，拼接和附加

char charr1[20];
char charr2[20] = "jinan";
//赋值操作
charr1 = charr2;

string str2 = {"Le Chapon Dodu"};
string str3 = {"Le Dodu"};
str3 = str3 + str2;

结构体

//申请结构体
stuct tree
{
    int l;
    int r;
    double k;
}

//申请结构体数组
struct tree a[50];

//初始化结构体
tree b = {1,2,1.0};
a[0] = b;

vector

#include<vector>

vector<int> v;

//把1压入堆栈
v.push_back(1);

//返回首尾元素
int a = v.begain();
int b = v.end();

//返回v的大小
v.size(); 

//判断是否为空
v.empty();