int与string、int与QString互转

1 int转string

1.1 流的 << 运算符

// 流的 << 运算符
int a = 10;
stringstream ss;
ss << a;
string str = ss.str();

1.2 c++11 std::to_string

int a = 10;
std::string s = std::to_string(a);

2 string 转 int

2.1 std::atoi

string _str = pSaveConfigElement->FirstChildElement("SaveVideoWidth")->GetText()；
int mVideoWidth = std::atoi(_str);

3 int转QString

3.1.直接调用QString::number()

int number = 10;
QString str = QString::number(number );

4 QString 转 int

QString str = “10”;
int number = str.toInt();

5 QString转string

QString str = “10”;
string stdStr= str.toStdString();

6 string转QString

std::string _stdStr = "sfd";
QString _qStr(_stdStr.c_str());