C++中的高精度加法
#include <iostream>
#include <vector>
using namespace std;
vector<int> add(vector<int> &A, vector<int> &B) {
vector<int> C;
int t = 0; //进位
for ( int i = 0; i < A.size() || i < B.size(); i ++ ) {
if (i < A.size()) t += A[i];
if (i < B.size()) t += B[i];
C.push_back(t % 10);
t /= 10;
}
if (t) C.push_back(1);
return C;
}
int main() {
string a, b;
vector<int> A, B;
cin >> a >> b;
for ( int i = a.size() - 1; i >= 0; i -- ) A.push_back(a[i] - '0'); //将字符类型转变成数字类型
for ( int i = b.size() - 1; i >= 0; i -- ) B.push_back(b[i] - '0');
vector<int> C = add(A, B);
for ( int i = C.size() - 1; i >= 0; i -- ) cout << C[i];
return 0;
}
在函数vector[HTML_REMOVED] add(vector[HTML_REMOVED] &A, vector[HTML_REMOVED] &B)中加上引用,是用来提高效率