我是C++新手,正在编写一组子集程序,它接受用户定义的一组数字,其中第一个数字被认为是总数。我曾尝试使用DDD来调试此程序,但是我仍然遇到了出界错误。我似乎无法找出发生这种情况的原因。任何线索?谢谢。 以下是错误:子集总和程序
terminate called after throwing an instance of 'std::out_of_range'
what(): vector::_M_range_check
代码:
#include <iostream>
#include <vector>
#include <cassert>
#include <iomanip>
#include <climits>
#include <math.h>
#include <algorithm>
typedef unsigned int uint;
using namespace std;
//////// Function declerations //////////
void sum_of_subsets(uint index,
uint weight,
uint total,
vector<bool> &include,
vector<uint> &w,
uint W);
bool promising (uint index,
uint weight,
uint W,
vector<uint> w,
uint total);
。
/////////////// Main //////////////////
int main()
{
//string sortingCode = "-as";
vector<uint> w; // vector of weights
vector<bool> include;
uint W; // the total
uint index = 0;
uint weight = 0; // the current weight of subsets
uint total = 0; // the superset total weight
while(! cin.eof())
{
uint value;
if(cin >> value && ! cin.eof())
w.push_back(value);
}
W = w.front();
w.erase(w.begin());
// instantiate the include vector to false
for(uint k = 0; k <= w.size(); k++)
include.push_back(0);
// calculate the superset total
for(uint k = 0; k <= w.size()-1; k++)
total += w.at(k);
// calculate the sum of subsets accordig to CL argument
sum_of_subsets(index, weight, total, include, w, W);
// report success
return 0;
}
。
////////// Function Bodies ///////////
void sum_of_subsets(uint index,
uint weight,
uint total,
vector<bool> &include,
vector<uint> &w,
uint W)
{
cout << "inside sumb_of_subsets" << endl;
if(promising(index, weight, W, w, total))
{
cout << "promising is true, continue" << endl;
if(weight == W)
{
for(uint k = 0; k <= index; k++)
{
if(include.at(k))
cout << w.at(k) << " ";;
}
cout << endl;
}
else
{
include.at(index + 1) = 1;
cout << "index1 = " << index << endl;
sum_of_subsets(index + 1,
weight + w.at(index + 1),
total - w.at(index + 1),
include, w, W) ;
include.at(index + 1) = 0;
cout << "index2 = " << index << endl;
sum_of_subsets(index + 1,
weight,
total - w.at(index + 1),
include, w, W);
}
}
}
。
bool promising (uint index,
uint weight,
uint W,
vector<uint> w,
uint total)
{
cout << "inside promising" << endl;
cout << "W = " << W << endl;
cout << "weight = " << weight << endl;
return (weight + total >= W)
&& ((weight == W) || (weight + w.at(index+1) <= W));
}
“但是我继续得到一个越界错误” - 请分享您的错误消息。 – Bill 2013-04-23 21:47:35
我编辑了我的问题以上包括错误 – Busch 2013-04-23 21:50:34
ddd说这发生了什么? – Bill 2013-04-23 21:52:16