日志16

1.十进制转二进制

#include <iostream>

using namespace std;

int main() {

int n;

cin >> n;

int binary[32];

int index = 0;

if (n < 0) {

cout << "-";

n = -1*n;

}

while (n > 0) {

binary[index++] = n % 2;

n /= 2;

}

if (index == 0) {

cout << "0B";

}

else {

for (int i = index - 1; i >= 0; i--) {

cout << binary[i];

}

cout << "B";

}

return 0;

}

2.字符串连接

string a,b,c;

c=a+b;