HDU1265 floating point conversion

Verbatim https://www.dazhuanlan.com/2019/08/25/5d622bd96eb30/

Original title link

http://icpc.njust.edu.cn/Problem/Hdu/1265/

Description

Converts a real number s is represented by IEEE single precision floating point.

Input

First enter a number N (1 <= N <= 150), it indicates the number of instances; followed by N real numbers.

Output

Output IEEE floating point representation, capital letters.

Sample Input

1 2 3

2 23.85 -23.85

Sample Output

1 2	41BECCCD C1BECCCD

Analysis

A clever way, the 4-byte floating-point 32-bit memory space to copy integer ANS,

Then in hexadecimal way to print an integer ans;

Variable ans use long or unsigned int, because there are 32, if int, 32-bit bit represents positive and negative, only 31 are available, it will not be enough.

Code

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#include<cstdio> #include<cstring> using namespace std; int (){ long n,ans; float f; cin>>n; while(n--){ cin>>f; memcpy(&ans,&f,4); printf("%lXn",ans); } return 0; }