c++ - 如何将用户输入(字符串)转换为字符数组？

Question

我正在尝试编写一个程序，使用用户输入的二进制数将二进制转换为 base10

这是原始的“低效”代码:

void BASE10() {
 int col_0, col_1, col_2, col_3, col_4, col_5, col_6, col_7;
 cout << "Please enter the Binary number you would like to convert ONE digit at a time" << endl;
 cin >> col_0;
 cin >> col_1;
 cin >> col_2;
 cin >> col_3;
 cin >> col_4;
 cin >> col_5;
 cin >> col_6;
 cin >> col_7;
 int num = 0;

 if (col_0 == 1) {
           num = num +128;
 }
 if (col_1 == 1) {
           num = num +64;
 }
 if (col_2 == 1) {
           num = num +32;
 }
 if (col_3 == 1) {
           num = num +16;
 }
 if (col_4 == 1) {
           num = num +8;
 }
 if (col_5 == 1) {
           num = num +4;
 }
 if (col_6 == 1) {
           num = num +2;
 }
 if (col_7 == 1) {
           num = num +1;
 }

 cout << num << endl;

 Restart();

我想使用 for 循环来传递单个字符串，而不是这个，用户输入到一个整数数组中，然后可以在计算中使用该数组。我该怎么做？

Answer 1

#include <iostream>
#include <string>
#include <bitset>

int main()
{
   const std::string str = "00100101";
   std::cout << std::bitset<8>(str).to_ulong() << '\n';
}