C语言typedef #

typedef 原类型 新类型名;

typedef int Integer;
typedef float Real;

Integer a = 10;
Real b = 3.14;

typedef struct {
    char name[20];
    int age;
} Student;

Student stu = {"Alice", 20};

typedef int* IntPtr;
typedef char* String;

IntPtr p = &a;
String str = "Hello";

typedef int IntArray[10];

IntArray arr;
arr[0] = 1;

typedef int (*Operation)(int, int);

int add(int a, int b) { return a + b; }

Operation op = add;

#ifdef _WIN32
    typedef __int64 int64_t;
#else
    typedef long long int64_t;
#endif

typedef void (*SignalHandler)(int);
SignalHandler handler;