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[英]error: no matching function for call to ‘std::vector<std::__cxx11::basic_string<char> >::push_back(int&)’
[英]error: no matching function for call to ‘std::vector<std::vector<int>>::push_back(std::vector<std::__cxx11::basic_string<char> >&)’
我正在嘗試從我的主管調試此代碼,而我是C ++的新手。
我發現了一些類似的no matching function for call to
問題,這使我知道了問題可能是什么,但無法解決。
我在錯誤消息和相關功能下面列出了我的想法。
錯誤信息:
In function ‘int main(int, char**)’:
distanceMatrixToSageGraph.c:104:43: error: no matching function for call to
‘std::vector<std::vector<int>>::push_back(std::vector<std::__cxx11::basic_string<char> >&)’
the_entries.push_back( row_as_vector );
相關功能:
int main(int argc, char** threshold_and_distanceMatrixfilename)
{
if (argc < 2 || argc > 2)
{
std::cerr << "Usage: ./distanceMatrixToSageGraph.o <threshold>
<distanceMatrix_file_calculated_fromDGEsingleCell_data>" << std::endl;
return -1;
}
string distanceMatrixfilename = threshold_and_distanceMatrixfilename[2];
int threshold = std::stoi(threshold_and_distanceMatrixfilename[1]);
std::ifstream distanceMatrixFile(distanceMatrixfilename);
if (!distanceMatrixFile)
{
std::cerr << "Error opening distanceMatrix file: " << distanceMatrixfilename << std::endl;
return -1;
}
string row;
std::getline(distanceMatrixFile, row); // discard the first row, which specifies the format of the file.
vector<vector<int>> the_entries;
while (std::getline(distanceMatrixFile, row))
{
std::stringstream row_as_stringstream(row);
int i; i = 0;
vector<string> row_as_vector;
while (row_as_stringstream.good())
{
string substr;
getline(row_as_stringstream, substr, ',');
row_as_vector.push_back(substr);
};
the_entries.push_back(row_as_vector); //LINE 104
};
}
思路:
std::vector<std::vector<int>>::push_back(std::vector<std::__cxx11::basic_string<char>>&)
std::vector<std::vector<int>>
是一個矩陣,而push_back
在向量的末尾添加了一個元素。 the_entries.push-back(row_as_vector)
讀取錯誤的類型。 原始代碼將一個csv
文件作為輸入,其中包含integers
和strings
。 現在,我們正在讀取具有以下形狀的txt
文件:
TEXT 0; INT; INT; INT; INT; ... 0; INT; INT; INT; INT; ... 18 more lines of the above numbers and semicolons
在上面,我們刪除了89
行中的第一行。
是否可能需要對代碼進行更多更改才能讀取此txt
文件而不是csv
文件?
其余錯誤消息:
In file included from /usr/include/c++/6/vector:64:0,
from distanceMatrixToSageGraph.c:13:
/usr/include/c++/6/bits/stl_vector.h:914:7: note: candidate: void std::vector<_Tp, _Alloc>::push_back(const value_type&) [with _Tp = std::vector<int>; _Alloc = std::allocator<std::vector<int> >; std::vector<_Tp, _Alloc>::value_type = std::vector<int>]
push_back(const value_type& __x)
^~~~~~~~~
/usr/include/c++/6/bits/stl_vector.h:914:7: note: no known conversion for argument 1 from ‘std::vector<std::__cxx11::basic_string<char> >’ to ‘const value_type& {aka const std::vector<int>&}’
/usr/include/c++/6/bits/stl_vector.h:932:7: note: candidate: void std::vector<_Tp, _Alloc>::push_back(std::vector<_Tp, _Alloc>::value_type&&) [with _Tp = std::vector<int>; _Alloc = std::allocator<std::vector<int> >; std::vector<_Tp, _Alloc>::value_type = std::vector<int>]
push_back(value_type&& __x)
^~~~~~~~~
/usr/include/c++/6/bits/stl_vector.h:932:7: note: no known conversion for argument 1 from ‘std::vector<std::__cxx11::basic_string<char> >’ to ‘std::vector<std::vector<int> >::value_type&& {aka std::vector<int>&&}’
整個代碼:
// Convert distanceMatrix tables of protein interactions to SAGE graph.
///////////////////////////////////////////////////////////////////////////
#include <iostream>
#include <fstream>
#include <sstream>
#include <math.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <list>
#include <vector>
#include <tuple>
#include <algorithm>
using namespace std;
void writeGraphInSageFormat(string name, std::vector<std::vector<int>> TheEdges)
{
//////////////////////////////////////////////////////////////////////////////////////
// Write out the edges in SAGE format.
///////////////////////////////////////////////////////////////////////////////////////
int edgeNumber = TheEdges.size();
ofstream d1sageFile(name, ios::out);
d1sageFile << "g = Graph([" << endl;
for (int n = 0; n < edgeNumber; n++) {
d1sageFile << "(" << TheEdges[n][0] + 1 << "," << TheEdges[n][1] + 1 << ")," << endl;
}
d1sageFile << "])" << endl;
d1sageFile << "g.show()" << endl;
d1sageFile.close();
std::cout << "SAGE graph written into the file " << name << std::endl;
}
std::vector<std::vector<int>> ConvertEntriesMatrixToEdges(vector<vector<int>> the_entries, int threshold)
{
////////////////////////////////////////////////////////////////////////////////////////////
// Construct the edge-vertex incidence matrix (d_1) from the distanceMatrix entries matrix:
////////////////////////////////////////////////////////////////////////////////////////////
std::vector<std::string> proteinNames;
std::vector<std::vector<int>> TheEdges;
std::cout << "Registering only edges shorter than " << threshold << "." << std::endl;
int thisDistance;
for (int i = 0; i < the_entries.size(); i++)
{
for (int j = i + 1; j < the_entries.size(); j++)
{
// we could use the_entries.size() instead of the_entries.at(i).size(), because this is a square matrix.
thisDistance = the_entries.at(i).at(j);
if (thisDistance < threshold)
{
std::vector<int> CurrentEdge(2);
CurrentEdge[0] = i;
CurrentEdge[1] = j;
TheEdges.push_back(CurrentEdge);
};
};
};
return TheEdges;
}
///////////////////////////////////////////
// Main Program: Extract edges from a distanceMatrix file.
///////////////////////////////////////////
int main(int argc, char** threshold_and_distanceMatrixfilename)
{
if (argc < 2 || argc > 2)
{
std::cerr << "Usage: ./distanceMatrixToSageGraph.o <threshold> <distanceMatrix_file_calculated_fromDGEsingleCell_data>" << std::endl;
return -1;
}
string distanceMatrixfilename = threshold_and_distanceMatrixfilename[2];
int threshold = std::stoi(threshold_and_distanceMatrixfilename[1]);
std::ifstream distanceMatrixFile(distanceMatrixfilename);
if (!distanceMatrixFile) {
std::cerr << "Error opening distanceMatrix file: " << distanceMatrixfilename << std::endl;
return -1;
}
string row; //LINE 88
std::getline(distanceMatrixFile, row); // discard the first row, which specifies the format of the file.
vector<vector<int>> the_entries;
while (std::getline(distanceMatrixFile, row))
{
std::stringstream row_as_stringstream(row);
int i; i = 0;
vector<string> row_as_vector;
while (row_as_stringstream.good())
{
string substr;
getline(row_as_stringstream, substr, ',');
row_as_vector.push_back(substr);
};
the_entries.push_back(row_as_vector); //LINE 104
};
////////////////////////////////////////////////////////////
// Now we assemble the entries to an edges matrix, and write it into a Sage file:
////////////////////////////////////////////////////////////
std::vector<std::vector<int>> TheEdges = ConvertEntriesMatrixToEdges(the_entries, threshold);
char outputFilename[60]; strcpy(outputFilename, distanceMatrixfilename.c_str()); strcat(outputFilename, "AtThreshold"); string thrshld = std::to_string(threshold); strcat(outputFilename, thrshld.c_str()); strcat(outputFilename, ".txt");
writeGraphInSageFormat(outputFilename, TheEdges);
return 0;
}
我懷疑我們正在嘗試在the_entries.push-back(row_as_vector)中讀取錯誤的類型
error: no matching function for call to
‘std::vector<std::vector<int>>::push_back(std::vector<std::__cxx11::basic_string<char> >&)’
the_entries.push_back( row_as_vector );
是的 ,您對此有權。 錯誤消息表明您正在嘗試將字符串向量推回整數向量向量 。 它們是完全不同的類型,因此不可能。
您可能想要將the_entries
的類型the_entries
為
std::vector<std::vector<std::string>> the_entries;
// ^^^^^^^^^^^^
要么
使用std::stoi
將字符串轉換為整數,同時推回std::vector<int> row_as_vector
。
std::vector<int> row_as_vector;
while(row_as_stringstream.good())
{
// ......
row_as_vector.push_back(std::stoi(substr));
// ^^^^^^^^^^^^^^^^^^^
};
the_entries.push_back( row_as_vector );
是否可能需要對代碼進行更多更改才能讀取此
txt
文件而不是csv
文件?
如果這兩個內容相同,則無需在代碼中做太多改變。 但是;
應該在調用std::stoi
之前解析它們。 因為它可能通過invalid_argument異常為錯誤的參數。
一些建議:
using namespace std;
。 有關更多信息,請參見這篇文章: 為什么“使用命名空間標准”; 被認為是不良做法? std::string
, std::vector
等)傳遞給函數時,請考慮這種情況,無論參數是否為只讀。 如果應該修改數據,則傳遞給引用 ,如果是只讀的(在函數內部不應進行任何修改),則通過const-ref傳遞它們。 閱讀更多: 如何將對象傳遞給C ++中的函數?
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