C语言：合并数组

knowledge：数组的传递及返回

Demo：

#include <stdio.h>
#include <stdlib.h>

int* func(int a[],int b[]){
    int* s;
    s = malloc(sizeof(int)*5);
    s[0] = a[0];
    s[1] = a[1];
    s[2] = a[2];
    s[3] = b[0];
    s[4] = b[1];
    return s;
}

int main()
{
    int i = 0 ;
    int a[3] = {1,2,3};
    int b[2] = {4,5};
    int* s = func(a,b);
    for(i = 0 ; i < 5 ; i ++){
        printf("%d ",s[i]);
    }
    free(s);
    return 0;
}

Output:

1 2 3 4 5