I am trying to return a vector with template T with data from a file to be searched through in another function.
The program I am working on is a program that stores the name, date of birth, and address that was inputted to the program. I have tried to store the returned vector in another vector with the template type but it keeps on showing:
Error C2672 'getDataToVector': no matching overloaded function found
Error C2783 'std::vector> getDataToVector(std::ifstream)': could not deduce template argument for 'T'
template <class T>
void searchData(vector<string>& name, vector<int>& birthdate, vector<string>& address) {
bool found = false;
string entry;
string line;
int i = 0;
cout << "Please enter the name you want to search: " << endl;
getline(cin, entry);
std::ifstream in;
in.open("test_file.txt");
vector<T> file_data = getDataToVector(in);
while (!found) {
if (std::find(file_data.begin(), file_data.end(), entry) != file_data.end()) {
cout << "The name is found" << endl;
cout << file_data[i] << endl;
found = true;
}
i++;
}
}
template <class T>
vector<T> getDataToVector(std::ifstream infile) {
vector<T> data;
string line;
while (getline(infile, line)) {
data.push_back(line);
}
return data;
}
I am a beginner in c++ programming and am very appreciative for any help anyone can give me.
The error says it cannot deduce what T
in getDataToVector
should be. It can either be deduced from arguments ( not applicable in your case) or you can set it explicitly: getDataToVector<std::string>(in);
means T==std::string
. In your case you want to pass on the T
from searchData
- > getDataToVector<T>(in);
But looking at your code there's no need for templates at all, line
is always std::string
so data.push_back(line);
means that only std::vector<std::string>
makes sense. Same for searchData
as the T
is reduntand and is not even part of the function signature.
For starters the function getDataToVector
if it is not a member function of a class shall be declared before the function searchData
because it is referred in the function.
Secondly the parameter of the function shall be a reference
template
vector<T> getDataToVector(std::ifstream &infile) {
^^^
As the function is a template function and can not deduce the template parameter then you should write
vector<T> file_data = getDataToVector<T>(in);
^^^
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