I am new in c++. When I run my code got this error :(
Big Sorting.cpp: In function ‘int main(int, const char**)’: Big Sorting.cpp:13:22: error: no matching function for call to ‘std::vector >::push_back(int&)’ v.push_back(m); ^ In file included from /usr/include/c++/8.1.1/vector:64, from Big Sorting.cpp:2: /usr/include/c++/8.1.1/bits/stl_vector.h:1074:7: note: candidate: ‘void std::vector<_Tp, _Alloc>::push_back(const value_type&) [with _Tp = std::__cxx11::basic_string; _Alloc = std::allocator >; std::vector<_Tp, _Alloc>::value_type = std::__cxx11::basic_string]’ push_back(const value_type& __x) ^~~~~~~~~ /usr/include/c++/8.1.1/bits/stl_vector.h:1074:7: note: no known conversion for argument 1 from ‘int’ to ‘const value_type&’ {aka ‘const std::__cxx11::basic_string&’} /usr/include/c++/8.1.1/bits/stl_vector.h:1090:7: note: candidate: ‘void std::vector<_Tp, _Alloc>::push_back(std::vector<_Tp, _Alloc>::value_type&&) [with _Tp = std::__cxx11::basic_string; _Alloc = std::allocator >; std::vector<_Tp, _Alloc>::value_type = std::__cxx11::basic_string]’ push_back(value_type&& __x) ^~~~~~~~~ /usr/include/c++/8.1.1/bits/stl_vector.h:1090:7: note: no known conversion for argument 1 from ‘int’ to ‘std::vector >::value_type&&’ {aka ‘std::__cxx11::basic_string&&’}
here is my code
#include <iostream>
#include <vector>
#include <algorithm>
int main(int argc, char const *argv[]) {
std::vector<std::string> v;
int n, m;
std::cin >> n;
for (size_t i = 0; i < n; i++) {
std::cin >> m;
v.push_back(m);
}
sort(v.begin(), v.end());
for(int i = 0; i < v.size(); i++){
std::cout << v[i] << '\n';
}
return 0;
}
We mismatch the parameters to the function. We might be required to give the matched parameter to the specified method. Or we have to add a new function with the same data type. After checking and adding suitable parameters to the function in the program, the error, 'no matching function for a call' will be resolved.
1) std::vector is a sequence container that encapsulates dynamic size arrays. 2) std::pmr::vector is an alias template that uses a polymorphic allocator. The elements are stored contiguously, which means that elements can be accessed not only through iterators, but also using offsets to regular pointers to elements.
You are reading int
variable m
and trying to put it into a vector of strings. You should use std::vector<int>
instead.
Bottom line: your code needs only one change, most reasonable one would be to change std::vector<std::string>
to std::vector<int>
.
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