#include<stdio.h>
 
void cat_data(int *data1, const int *data2, int len2);
 
int main(void){
 int data1[7]={1,2,3,4,5,6,7},data2[5]={8,9,10,11,12},i;
 int size=sizeof(data2)/sizeof(data2[0]);
 
 for(i=0;i<7;i++)
  printf("%d ",data1[i]);
 
  cat_data(data1, data2, size);
 
  return 0;
}
 
void cat_data(int *data1, const int *data2, int len2){
 
 int i;
 
 for(i=0;i<len2;i++)
 {
  data1[i]=data2[i];
 }
 
 for(i=0;i<len2;i++)
 {
  printf("%d ",data1[i]);
 }
}

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