qfedu-basic-level/day4/d10.cpp

#include <iostream>

using namespace std;

int main()
{
    char c = 'a'; // 1B
    int m = 2;    // 4B
    // 小字节转大字节, 会自动转换
    m += c; // 先将c转换为int,再相加
    cout << "m = " << m << endl;
    // 大字节转小字节,会丢失精度,需要强制类型转换
    cout << "m to char is " << (char)m << endl;
    return 0;
}