int main()
{
string a;
a[0] = '1';
a[1] = '2';
a[2] = '\0';
cout << a;
}
解决方法
因为a是空的.如果您尝试使用空数组执行相同的操作,则会遇到相同的问题.你需要给它一些尺寸：
a.resize(5); // Now a is 5 chars long,and you can set them however you want
或者,您可以在实例化时设置大小：@H_404_5@
std::string a(5,' '); // Now there are 5 spaces,and you can use operator[] to overwrite them
