memcpy in place 数组内拷贝

#include <stdio.h>
#include <pthread.h>


int main(){

    int t1[10];
    int i = 0;
    for(i; i<10; i++)
    {
        t1[i] = i;
        printf("t1[%d] = %d\n", i, t1[i]);
    }
    printf("\n");

    memcpy(&t1[0], &t1[2], 5*sizeof(int));

    i = 0;
    for(i; i<5; i++)
    {
        printf("t1[%d] = %d\n", i, t1[i]);
    }
    return 0;
}

t1[0] = 2
t1[1] = 3
t1[2] = 4
t1[3] = 5
t1[4] = 6

t1[0] = 2
t1[1] = 5
t1[2] = 4
t1[3] = 5
t1[4] = 6