Offset

#include <stdio.h>

void copy_ptr(double source[], double target1[], int num, int offset);

int main(void){
    int i;
    double array[7]={1,2,3,4,5,6,7};
    double array2[3];
    copy_ptr(array, array2, 3, 4);

    for(i=0; i<3; i++)
        printf("%f\n", array2[i]);
    return 0;
}


void copy_ptr(double source[], double target1[], int num, int offset){
    int i;
    double *ptr = (source+offset);
    double *ptr2=target1;
    for(i=0; i<num; i++){
        *ptr2=*ptr;
        ptr2++;
        ptr++;
    }
}