#include <stdio.h>

int main() {
    int x; // 定義一個整型變量x
    float y; // 定義一個浮點(diǎn)型變量y
    char ch; // 定義一個字符型變量ch
    
    x = 10; // 給變量x賦值
    y = 3.14; // 給變量y賦值
    ch = 'A'; // 給變量ch賦值
    
    printf("x = %d
", x);
    printf("y = %f
", y);
    printf("ch = %c
", ch);
    
    return 0;
}

#include <stdio.h>

int main() {
    int a = 10; // 整型變量
    float b = 3.14; // 浮點(diǎn)型變量
    char c = 'A'; // 字符型變量
    
    int arr[5] = {1, 2, 3, 4, 5}; // 整型數(shù)組
    
    struct Person {
        char name[20];
        int age;
    };
    
    struct Person p1 = {"Alice", 25}; // 結(jié)構(gòu)體變量
    
    int *ptr; // 指針變量
    ptr = &a;
    
    printf("a = %d
", a);
    printf("b = %f
", b);
    printf("c = %c
", c);
    
    for(int i = 0; i < 5; i++) {
        printf("arr[%d] = %d
", i, arr[i]);
    }
    
    printf("Person: %s, %d
", p1.name, p1.age);
    
    printf("*ptr = %d
", *ptr);
    
    return 0;
}

#include <stdio.h>

int main() {
    int a = 10, b = 5;
    int sum, diff, product, quotient, remainder;
    
    sum = a + b;
    diff = a - b;
    product = a * b;
    quotient = a / b;
    remainder = a % b;
    
    printf("Sum: %d
", sum);
    printf("Difference: %d
", diff);
    printf("Product: %d
", product);
    printf("Quotient: %d
", quotient);
    printf("Remainder: %d
", remainder);
    
    return 0;
}