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。”

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."

youdao

处理文本需要某种约定将字符转换为计算机实际可以处理的数字；这些约定叫做字符编码。

Handling text requires that there be some convention for converting characters into the Numbers computers actually handle; these conventions are called character encodings.

youdao

可以把数据直接输入到模拟数字转换器和计算机进行处理。

The data can be entered directly into analog digital converters and computers for processing.

youdao

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