Question

以下代码给出了一个错误，其中定义了{0x30, 700...。在error: expected '}'行中，编译器说error: expected ';' at end of declaration和const struct State { unsigned int out; unsigned int time; //10ms units const struct State *next[16]; }; typedef const struct State SType; //define your states here e.g. #define stateName 0, etc. SType FSM[7]; #define goW &FSM[0]; #define go1 &FSM[1]; #define slowW &FSM[2]; #define slow1 &FSM[3]; #define crossW &FSM[4]; #define cross1 &FSM[5]; #define crossB &FSM[6]; //Declare your states here SType FSM[7] = { {0x30, 700, {goW, goW, slowW, slowW, slowW, slowW, slowW, slowW, cross1, cross1, slowW, slowW, slowW, slowW, slowW, slowW}}, {0x84, 700, {slow1, slow1, go1, slow1, slow1, slow1, slow1, slow1, slow1, slow1, slow1, slow1, slow1, slow1, slow1, slow1}}, {0x50, 200, {go1, go1, go1, go1, crossW, crossW, crossW, crossW, cross1, cross1, cross1, go1, crossB, crossB, crossB, crossB}}, {0x88, 200, {goW, goW, goW, goW, crossW, crossW, crossW, goW, cross1, cross1, cross1, cross1, crossB, crossB, crossB, goW}}, {0x92, 400, {goW, goW, go1, goW, crossW, goW, go1, go1, cross1, cross1, cross1, cross1, crossB, crossB, crossB, crossB}}, {0x31, 400, {goW, goW, go1, goW, crossW, crossW, crossW, crossW, cross1, cross1, go1, goW, crossB, crossB, crossB, crossB}}, {0x93, 400, {goW, goW, go1, goW, crossW, goW, go1, goW, cross1, cross1, go1, goW, crossB, goW, go1, go1}} };

根据我们老师的示例代码，这应该有效。但是我在其他地方看到我们应该在结构之外定义“下一个状态”的数组。是这样的吗？

int previous = 0;
int number = 0;
for (int i=1; i < 20; ++i) {
    System.out.print(number + " ");

    if (i % 2 != 0) {
        number = previous + i;
        previous = number;
    }
    else {
        number = previous * i;
        previous = number;
    }
}

Answer 1

在每个;之后摆脱#define。这些不是C语句，也不需要分号。

使用列表定义中的数组创建链接列表时出错

1 个答案: