append, C++ (gcc) - rextester

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//g++  7.4.0

//write a function that appends first  n elements of array b onto the end of the first m elements of array a. Make sure array a has room for at least m+n elements;
//this code is created by Rezaul Hoque on June 14,2021; contact: jewelmrh@yahoo.com
//note: codes shared by Rezaul Hoque on rextester are not for sale; they are created and shared to facilitate the algorithm learning process; many like Hoque use this platform to practice programming ;Rezaul hopes his contribution helps others to fine tune their  learning;

#include <iostream>
using namespace std;
int size =9;
int m=5, n=2;

void append(int [], int , int [], int);
void append(int a[], int m, int b[], int n){
int i;

for (i=0;i<n; i++)
a[m+i]= b[i];//append n elements of b at the end of a, starting from index m ; so when i= 0, a=m; when i=1, a= m+1...
for(i=0;i<size;i++)
cout<<" "<<a[i];
}
int main ()
{
int a[size]={1,2,3,4,5,0,0,0,0};//size of array a must have ample room so that we could put the elements of b at the end of it; for this reason , rest of the elements of array a are filled with 0
int b[n]={6,7};
append(a,5,b,2);
return 0;
}

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Compilation time: 0.42 sec, absolute running time: 0.15 sec, cpu time: 0.01 sec, memory peak: 5 Mb, absolute service time: 0,65 sec