error: too few arguments to function 'std::vector - c++

Question

I am getting a compile error when I try to access my function
The program retrieves data from 2 different source and is supposed to come together in that one function.
k.cpp: In function 'int main()':
k.cpp:65:10: error: too few arguments to function 'std::vector<std::basic_string<char> > buymngr(FILE*)'
k.cpp:45:26: note: declared here
It is indicating that I am missing a parameter here -> std::vector buymngr(FILE *buyfp)
I am just very unsure of what it is asking for.
#include <cstdio>
#include <iostream>
#include <fstream>
#include <stdio.h>
#include <unistd.h>
#include <cstring>
#include <cstdlib>
#include <vector>
using namespace std;
FILE *init( const char *fname ){
FILE *buyfp = popen( fname, "r" );
return buyfp;
}
vector<string> getmyData()
{
FILE *fp = popen("php orders.php 155", "r");
if (fp == NULL) perror ("Error opening file");
char buff[BUFSIZ];
vector<string> vrecords;
while(fgets(buff, sizeof(buff), fp) != NULL){
size_t n = strlen(buff);
if (n && buff[n - 1] == '\n') buff[n - 1] = '\0';
if (buff[0] != '\0') vrecords.push_back(buff);
}
return vrecords;
}
std::vector<std::string> getmarketbuyData(FILE *buyfp){
char buff2[BUFSIZ];
vector<std::string> vrecs;
while(std::fgets(buff2, sizeof buff2, buyfp) != NULL){
size_t n = std::strlen( buff2 );
if ( n && buff2[n-1] == '\n' ) buff2[n-1] = '\0';
if ( buff2[0] != '\0' ) vrecs.push_back( buff2 );
}
for(int t = 0; t < vrecs.size(); ++t){
cout << vrecs[t] << " " << endl;
}
return vrecs;
}
std::vector<std::string> buymngr(FILE *buyfp){
vector<std::string> buydat;
vector<std::string> markdat;
buyfp = init("php buyorders.php 155");
if (buyfp == NULL) perror ("Error opening file");
if ( buyfp ){
buydat = getmarketbuyData( buyfp );
}
for(int b = 0; b < sizeof(buydat); ++b){
cout << buydat[b] << " " << endl;
}
markdat = getmyData();
for(int l = 0; l < sizeof(markdat); ++l){
cout << markdat[l] << " " << endl;
}
}
//Le Main
int main(void)
{
buymngr(FILE*);
}
How do I get rid of the error? What parameter is it asking for?

Answer 1

Your definition goes like:-
std::vector<std::string> buymngr(FILE *buyfp)
so it's expecting FILE* type as its argument whereas you're calling it:-
buymngr();
without any arguments.