C++ 字符串处理

}

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#include
#include
#include
using namespace std;
int main()
{
int size = 0;
int length = 0;
unsigned long maxsize = 0;
int capacity = 0;
string str("12345678");
string str_custom;
//预分配存储大小
str_custom.reserve(5);
str_custom = str;

//求字符的个数
size = str_custom.size();
length = str_custom.length();

//字符的最大的容量
maxsize = str_custom.max_size();


//从新分配内存之前能够得到的最大内存容量
capacity = str_custom.capacity();
cout<<"size = "< cout<<"length = "< cout<<"maxsize = "< cout<<"capacity = "< return 0;
}

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#include
#include
#include
using namespace std;
int main()
{
string cS("conststring");
string s("abcde");
char temp = 0;
char temp_1 = 0;
char temp_2 = 0;
char temp_3 = 0;
char temp_4 = 0;
char temp_5 = 0;
temp =s[2];
temp_1 = s.at(2);
temp_2 = cS[cS.length()];
cout< cout<