string 与 int/double 转换

头文件stdlib.h / string

string转int

string str = "020948";
int n = atoi(str.c_str());
int n = stoi(str);

int 转string

str = to_string(n);

string转double

string str = "0.983";
double n = atof(str.c_str());

double转string​​​​​​​（还是用to_string())

str = to_string(n);