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

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