摘要：音调数据 enum scale { Rest = 0 , A0 = 21 , A0s = 22 , B0 = 23 , C1 = 24 , C1s = 25 , D1 = 26 , D1s = 27 , E1 = 28 , F1 = 29 , F1s = 30 , G1 = 31 , G1s = 3 阅读全文

摘要：1 __builtin_ctz(x); // 求x的二进制数末尾0的个数 2 __builtin_ctz(0b0100) //2 3 4 __builtin_clz(x); // 求x的二进制数前导0的个数(ps:一共有32位) 5 __builtin_clz(0b0100) //29 6 7 __ 阅读全文