cpp/DeepSeek_API/examples/04_arithmetic.c

/*
 * 示例4：算术运算（Arithmetic Operations）
 * 功能：学习 C 语言中的基本算术运算符
 */

#include <stdio.h>

int main() {
    int a = 10;
    int b = 3;

    // 加法运算
    int sum = a + b;
    printf("%d + %d = %d\n", a, b, sum);

    // 减法运算
    int diff = a - b;
    printf("%d - %d = %d\n", a, b, diff);

    // 乘法运算
    int product = a * b;
    printf("%d * %d = %d\n", a, b, product);

    // 除法运算（注意：整数除法会丢弃小数部分）
    int quotient = a / b;
    printf("%d / %d = %d（整数除法，丢弃小数）\n", a, b, quotient);

    // 取余运算（求余数）
    int remainder = a % b;
    printf("%d %% %d = %d（取余数）\n", a, b, remainder);

    // 浮点数除法（保留小数）
    float result = (float)a / b;  // (float)a 把 a 转换为浮点数
    printf("%d / %d = %.2f（浮点数除法）\n", a, b, result);

    // 自增和自减运算
    int count = 5;
    count++;  // count 加 1，等价于 count = count + 1
    printf("自增后 count = %d\n", count);
    count--;  // count 减 1
    printf("自减后 count = %d\n", count);

    return 0;
}