book-programming Zhu Ji Nanxiong-First chapter

The first chapter ... October 25, 2016 22:41:45

A 143,000 number can be stored in the 1MB storage space, and if each number is represented by a 32-bit integer , the 1MB storage space can be stored 250,000 a number;

I can see it in a daze. Answer:

1MB (bytes) =1024kb (bytes) =1024*1024bytes
1024*1024/7 is approximately 149,796

But sometimes for convenience of estimation, 1024 is usually taken as 1000, i.e.
1mb=1000kb=1000,000byte
1000,000/7 is about 142,857, estimated, almost 143000.
This value should come in this way;

143,000 was clear, but the 250,000 continued to blur ... Read carefully several times, the original is to each < number > as each < number >: A number consisting of 7 numbers;

Make (see) understand after: 32-bit integer is 4 bytes, 1000,000/4 = 250,000


Not to be continued ...

book-programming Zhu Ji Nanxiong-First chapter