处理大数进制
将一个长度最多为30位数字的十进制非负整数转换为二进制数输出
代码语言:javascript复制#include <algorithm>
#include <cstdio>
#include <iostream>
#include <string>
using namespace std;
string conversion(int m, string a, int n) {
int l = a.length(), k;
string b = "";
for (int i = 0; i < l; ) {
//塞入数字
k = 0;
//求商求余
for (int j = i; j < l; j ) {
int t = (k * m a[j] - '0') % n;
a[j] = (k * m a[j] - '0') / n '0';
k = t;
}
b = char(k '0');
while (a[i] == '0') i ;
}
reverse(b.begin(), b.end()); //反过来
return b;
}
int main() {
string a, b;
while (cin >> a) {
b = conversion(10, a, 2);
cout << b << endl;
}
return 0;
}