wehub-resource-sync
91 lines
1.6 KiB
C
91 lines
1.6 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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// Macro definitions
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#define MAX_SIZE 100
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#define SQUARE(x) ((x) * (x))
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// Type definitions
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typedef struct {
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char name[50];
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int age;
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} Person;
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typedef enum {
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MONDAY,
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TUESDAY,
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WEDNESDAY,
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THURSDAY,
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FRIDAY
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} Weekday;
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// Global variables
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static const double PI = 3.14159;
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int globalCounter = 0;
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// Function declarations
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void printPerson(const Person* p);
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int factorial(int n);
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// Union example
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union Data {
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int i;
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float f;
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char str[20];
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};
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// Function pointer type
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typedef int (*Operation)(int, int);
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// Function implementations
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int add(int a, int b) {
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return a + b;
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}
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int subtract(int a, int b) {
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return a - b;
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}
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void printPerson(const Person* p) {
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printf("Name: %s, Age: %d\n", p->name, p->age);
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}
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int factorial(int n) {
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if (n <= 1) return 1;
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return n * factorial(n - 1);
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}
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// Main function
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int main() {
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// Local variable declarations
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Person person = {"John Doe", 30};
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union Data data;
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Operation op = add;
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// Using structs
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printPerson(&person);
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// Using unions
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data.i = 10;
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printf("data.i: %d\n", data.i);
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// Using function pointers
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printf("10 + 20 = %d\n", op(10, 20));
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op = subtract;
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printf("10 - 20 = %d\n", op(10, 20));
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// Using macros
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printf("Square of 5 is %d\n", SQUARE(5));
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// Using enums
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Weekday today = WEDNESDAY;
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printf("Day number: %d\n", today);
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// Using global variables
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globalCounter++;
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printf("Global counter: %d\n", globalCounter);
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return 0;
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}
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