#include <stdio.h>
 
void cat_data(int *data1, const int *data2, int len2);
 
int main(void)
{
	int data1[7] = {1,2};
 
	int data2[5] = {4,5,6,7,8};
 
	int len2 = sizeof(data2)/sizeof(data2[0]);
 
	cat_data(data1,data2,len2);
 
	for(int i=0;i<7;i++)
	{
		printf("%d\n",data1[i]);
	}
 
	return 0;
}
 
void cat_data(int *data1, const int *data2, int len2)
{
	int i=0,n=0;
 
	while(data1[i]!=0){
		i++;
	}
	int l=len2+i+1;
	for(i+1;i<l;i++)
	{
		data1[i]=data2[n];
		n=n+1;
	}
}
 

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