十进制二进制转换

基于库函数实现十进制转二进制，二进制转十进制。

｛二进制以字符串形式表示，不含除"0", "1"外其他字符｝

Language support(Up to now 16.9.14): C/C++ , Python

C/C++:

Dec->Bin

#include <stdio.h> #include <stdlib.h> char buffer[9] = {0}; _itoa( _integer, buffer, 2 ); // 8 bit

E.g.

int _integer = 8; _itoa( _integer, buffer, 2); cout << buffer; 1000 Bin->Dec #include <stdio.h> #include <stdlib.h> string str_bin = "00011"; char *stop; int _integer = strtol(str_bin.substr(0,4).c_str(), &stop, 2); // long -> int cout << _integer; 1

C++新增std: stoi

Python:

Dec->Bin

bin(_integer)[2:] E.g. _integer = 10 bin(_integer) '0b1010' bin(_integer)[2:] '1010' Bin->Dec

int(str_bin, 2) E.g.

str_bin = "0001" int(str_bin, 2) 1