I have a (binary) file which has multiple entries of an array of 6 elements. So the file would be structured something like this :
{1 2 12 18 22 0} {11 17 20 19 20 7} {3 9 18 24 0 9}...
where I have put brackets around the elements that form one array. I'd like to sort the file based only on the first element of each array, so the sorted file should read
{1 2 12 18 22 0} {3 9 18 24 0 9} {11 17 20 19 20 7}...
How would I go about doing this?
qsort.qsort with your comparision function to sort the array.
#include<stdio.h>
#include<vector>
#include<algorithm>
#include<iostream>
using namespace std;
int main () {
vector < vector<int> > v;
vector <int> t;
t.push_back(4);
t.push_back(5);
t.push_back(6);
v.push_back(t);
t.clear();
t.push_back(1);
t.push_back(2);
t.push_back(3);
v.push_back(t);
sort(v.begin(),v.end());
for (int i = 0; i < v.size(); i++){
for (int j = 0; j < v[i].size(); j++){
cout << v[i][j] << " ";
}
cout << endl;
}
return 0;
}
