/* ===== 模块7：高级特性 =====
 * test14_assignment — 复合赋值
 * 难度：2/5
 * 验证点：+= -= *= /= %= &= |= ^= <<= >>=
 */
fn main() i32 {
    var x: i32 = 10;

    /* += */
    x += 5;
    if x != 15 { ret 1; }

    /* -= */
    x -= 3;
    if x != 12 { ret 2; }

    /* *= */
    x *= 2;
    if x != 24 { ret 3; }

    /* /= */
    x /= 4;
    if x != 6 { ret 4; }

    /* %= */
    var y: i32 = 17;
    y %= 5;
    if y != 2 { ret 5; }

    /* &= */
    var a: i32 = 0xFF;
    a &= 0x0F;
    if a != 0x0F { ret 6; }

    /* |= */
    var b: i32 = 0xF0;
    b |= 0x0F;
    if b != 0xFF { ret 7; }

    /* ^= */
    var c: i32 = 0xFF;
    c ^= 0xF0;
    if c != 0x0F { ret 8; }

    /* <<= */
    var d: i32 = 1;
    d <<= 4;
    if d != 16 { ret 9; }

    /* >>= */
    var e: i32 = 64;
    e >>= 3;
    if e != 8 { ret 10; }

    ret 0;
}