s1 Here's s1, it's pointing to this array, bracket I is bracket zero initially so it's pointing at capital F. Same deal.

i】是什么？，Well，，what’s，s1，bracket，I？,这里是s1，指向的是这个数组，【i】开始是【0】，它指向的是,大写的F，同样的道理。

youdao

f Well, call toupper pass this lowercase F F to this function called toupper it's going to return capital F and so what do I assign to s2 bracket zero?

调用toupper函数，传递这个小写,然后返回的是大写的,那么我对s2【0】赋值多少？

哈佛公开课 - 计算机科学课程节选

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