C++中char、string 和 int 的相互转换

有的内置函数需要添加头文件，请自行搜索增加记忆

//int->string
#include 

int x1 = 312;
string s1 = to_string(x);
cout << s1 << endl;

//string->int
#include 

string s2 = "123456";
int x2 = std::stoi(s2);
cout << x2 << endl;

//char->string
char c[80] = "1a2b3d4d";
string s3 = c;
cout << s3 << endl;

//string->char
string s4 = "qwertyuiop";
char *c2 = new char[80];
strcpy(c2, s4.c_str());
cout << c2 << endl;
delete c2;
c2 = nullptr;

//char->int
#include 

char c[80] = "258963";
int x3 = atoi(c);
cout << x3 << endl;

//int->char 曲线救国:
int->string->char