关模拟初学c++顺序结构算数运算的程序出10道

当你初学 C++ 语言并想要练习基本的顺序结构和算术运算时，可以编写一些简单的程序来解决数学题目。这里提供10个例子：

1. 计算两个整数的加法：

#include <iostream>
int main() {
    int a = 5;
    int b = 3;
    int sum = a + b;
    std::cout << "The sum of " << a << " and " << b << " is " << sum << std::endl;
    return 0;
}

2. 减法运算：

int main() {
    int num1 = 10;
    int num2 = 4;
    int difference = num1 - num2;
    std::cout << "The difference between " << num1 << " and " << num2 << " is " << difference << std::endl;
    return 0;
}

3. 乘法操作：

int main() {
    double x = 2.5;
    double y = 3.7;
    double product = x * y;
    std::cout << "The product of " << x << " and " << y << " is " << product << std::endl;
    return 0;
}

4. 除法演示：

#include <iostream>
double safe_division(double numerator, double denominator) {
    if (denominator == 0) {
        std::cerr << "Error: Division by zero!" << std::endl;
        return 0; // 或者抛异常
    }
    return numerator / denominator;
}

int main() {
    double divisor = 5.0;
    double dividend = 2.0;
    double quotient = safe_division(dividend, divisor);
    std::cout << "The quotient of " << dividend << " divided by " << divisor << " is " << quotient << std::endl;
    return 0;
}

5. 整数取模运算：

#include <iostream>
int main() {
    int num = 15;
    int divisor = 7;
    int remainder = num % divisor;
    std::cout << "The remainder when " << num << " is divided by " << divisor << " is " << remainder << std::endl;
    return 0;
}

6. 幂运算：

#include <cmath>
int main() {
    double base = 2;
    int exponent = 3;
    double result = pow(base, exponent);
    std::cout << "The result of " << base << "^" << exponent << " is " << result << std::endl;
    return 0;
}

7. 求平均值：

#include <vector>
int main() {
    std::vector<int> numbers {1, 2, 3, 4, 5};
    double average = 0;
    for (int i : numbers) {
        average += i;
    }
    average /= numbers.size();
    std::cout << "The average of the numbers is " << average << std::endl;
    return 0;
}

8. 最大值和最小值比较：

#include <algorithm>
int main() {
    int array[] = {9, 2, 7, 5, 1};
    int max_num = *std::max_element(array, array + sizeof(array) / sizeof(array[0]));
    int min_num = *std::min_element(array, array + sizeof(array) / sizeof(array[0]));
    std::cout << "Max number: " << max_num << ", Min number: " << min_num << std::endl;
    return 0;
}

9. 计算阶乘：

#include <iostream>
unsigned long long factorial(int n) {
    if (n == 0 || n == 1) return 1;
    else return n * factorial(n - 1);
}

int main() {
    int num = 5;
    unsigned long long fact = factorial(num);
    std::cout << "Factorial of " << num << " is " << fact << std::endl;
    return 0;
}

10. 判断奇偶性：

int main() {
    int num = 17;
    if (num % 2 == 0) {
        std::cout << num << " is even." << std::endl;
    } else {
        std::cout << num << " is odd." << std::endl;
    }
    return 0;
}