If you want to do the opposite process, you simply "cast to an int from a char."

如果你想做相反的转换，你就告诉计算机,“把那个char型数据转换成int型处理“

哈佛公开课 - 计算机科学课程节选

A If you want to convert a number like 65 to the letter A, you just have tell the computer "cast that int to a char."

如果你要把一个像65这样的数字转换为字母，你只需要告诉计算机“把那个int型数据转换成char型处理“

哈佛公开课 - 计算机科学课程节选