答案 0 :(得分:1)
您不能将字符串转换为整数。但是,可以使用stoi()获取字符串数字值,然后将其分配给整数:
#include <iostream>
#include <string>
using namespace std;
int main()
{
string str1 = "45";
string str2 = "3.14159";
string str3 = "31337 geek";
int myint1 = stoi(str1);
int myint2 = stoi(str2);
int myint3 = stoi(str3);
cout << "stoi(\"" << str1 << "\") is "
<< myint1 << '\n';
cout << "stoi(\"" << str2 << "\") is "
<< myint2 << '\n';
cout << "stoi(\"" << str3 << "\") is "
<< myint3 << '\n';
return 0;
}
Output:
stoi("45") is 45
stoi("3.14159") is 3
stoi("31337 geek") is 31337
还有其他一些方法,例如使用stringstream,您可能要看一下。希望它会有所帮助。