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计算一个正整数除以3的余数，以下选项正确的是（ ）。
int m;
cin >> m;
switch (m % 3)
{
default:
cout << "remainder is 1"; break;// 余数是1
default:
cout << "remainder is 2"; break;// 余数是2
case 0:
cout << "remainder is 0"; break;// 余数是0
}
int m;
cin >> m;
switch m % 3:
{
case 0:
cout << "remainder is 0"; break; // 余数是0
case 1:
cout << "remainder is 1"; break; // 余数是1
default:
cout << "remainder is 2"; // 余数是2
}
int m;
cin >> m;
switch (m % 3)
{
default:
cout << "remainder is 2"; break; // 余数是2
case 0:
cout << "remainder is 0"; break; // 余数是0
case 1:
cout << "remainder is 1"; break; // 余数是1
}
int n = 1;
int m;
cin >> m;
switch (m % 3)
{
case 0:
cout << "remainder is 0"; break; // 余数是0
case n:
cout << "remainder is 1"; break; // 余数是1
default:
cout << "remainder is 2"; // 余数是2
}
