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

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