錯誤：向量下標超出範圍。 1201線

Question

我對着矢量標超出範圍埃羅的。我設法找到導致問題的代碼，但我不知道如何解決它。

定義的變量類型，

typedef vector <string> v1; //vector string 

typedef vector <v1> v2; // vector (v1) to create a double vector 

typedef map<string, int> mapstint; //vector (string, int) 

typedef vector<int> vint; // vector (int) 

typedef vector<double> vd; 

的代碼如下，

string splitgain(v2 &table) 
{ 
    int col, i; 

    string coln; 
    mapstint map; 
    double min = DBL_MAX; 
    int splitcol = 0; 
    vint eval,nos; 

    for (col = 0; col < table[0].size() - 1; col++) 
    { 
     coln = table[0][col]; 
     vint counts = countno(table, col); 
     vd atteval; 
     double colval = 0.0; 
     for (i = 1; i < table.size() - 1; i++) 
     { 
      double val = 0.0; 
      if (map.find(table[i][col]) != map.end()) 
      { 
       map[table[i][col]]++; 
      } 
      else 
      { map[table[i][col]] = 1; 
       v2 tempt = prune(table, coln, table[i][col]); 

       vint ccounts = countno(tempt, tempt[0].size() - 1); 
       int j, k; 
       for (j = 0; j < ccounts.size(); j++) 
       { 
        double temp = (double)ccounts[j]; 
        val -= (temp/ccounts[ccounts.size() - 1])*(log(temp/ccounts[ccounts.size() - 1])/log(2)); 
       } 
       atteval.push_back(val); 
       val = 0.0; 
      } 
     } 

     //------THIS IS WHERE THE ERROR IS COMING FROM------- 

     for (i = 0; i < counts.size() - 1; i++) 
     { 
      colval += ((double) counts[i] * (double) atteval[i]); 
     } 
     //---------------------------------------------------- 

     colval = colval/((double)counts[counts.size() - 1]); 
     if (colval <= min) 
     { 
      min = colval; 
      splitcol = col; 
     } 
    } 
    return table[0][splitcol]; 
} 

Answer 1

請注意你的編譯器的警告（或增加警告級別）

所有循環

for (col = 0; col < table[0].size() - 1; col++)

for (i = 1; i < table.size() - 1; i++)

for (i = 0; i < counts.size() - 1; i++)

很麻煩。

注意的std ::爲size_t（0） - 1個= =的std :: numeric_limits ::最大（）