C 中的函数数组处理

# 使用C语言中的函数数组处理数据

c
#include 
// 定义一个简单的函数
int add(int a, int b) {
    return a + b;
}
int subtract(int a, int b) {
    return a - b;
}
int multiply(int a, int b) {
    return a * b;
}
int divide(int a, int b) {
    if (b != 0) {
        return a / b;
    } else {
        printf("Error: Division by zero%
");
        return 0;
    }
}
int main() {
    // 声明一个函数指针
    int (*operation)(int, int);
    // 声明一个函数指针数组并初始化
    int (*operations[4])(int, int) = {add, subtract, multiply, divide};
    // 使用函数指针数组调用函数
    operation = operations[0];
    printf("Addition: %d%
", operation(5, 3));
    operation = operations[1];
    printf("Subtraction: %d%
", operation(5, 3));
    operation = operations[2];
    printf("Multiplication: %d%
", operation(5, 3));
    operation = operations[3];
    printf("Division: %d%
", operation(6, 2));
    return 0;
}

c
#include 
typedef struct {
    int (*operation)(int, int);
} Calculator;
int add(int a, int b) {
    return a + b;
}
int subtract(int a, int b) {
    return a - b;
}
int main() {
    Calculator calculator;
    // 使用不同的函数实现多态性
    calculator.operation = add;
    printf("Addition: %d%
", calculator.operation(5, 3));
    calculator.operation = subtract;
    printf("Subtraction: %d%
", calculator.operation(5, 3));
    return 0;
}

c
#include 
typedef void (*EventHandler)();
void handleMouseClick() {
    printf("Mouse Click Event%
");
}
void handleKeyPress() {
    printf("Key Press Event%
");
}
int main() {
    EventHandler eventHandlers[] = {handleMouseClick, handleKeyPress};
    // 模拟鼠标点击事件
    eventHandlers[0]();
    // 模拟键盘按键事件
    eventHandlers[1]();
    return 0;
}