void *memset(void *s，int ch，int n)；

Function:

Set each byte of a block in memory to ch, and the block size is n, where n is in bytes.

The title requirement is: initialize an integer array so that its output is all 1.

If you want to output 1, you can use 1 as the character.

int a[5]；

memset(a，' 1 '，5 * sizeof(int))；