c++要求读入2个整数A和B，然后分别输出它们的和、差、积、商、模的算式和结果

在C++中，你可以使用标准输入流`cin`来读取两个整数A和B，并通过控制台输出相应的算术运算表达式和计算结果。下面是一个简单的示例：

#include <iostream>

int main() {
    int A, B;
    
    // 读取两个整数
    std::cout << "请输入第一个整数 A: ";
    std::cin >> A;
    std::cout << "请输入第二个整数 B: ";
    std::cin >> B;

    // 计算并输出算式和结果
    int sum = A + B;
    int difference = A - B;
    int product = A * B;
    if (B != 0) {  // 防止除数为零
        float quotient = static_cast<float>(A) / B;
    } else {
        quotient = 0;  // 或者抛出异常处理除零错误
    }
    int modulus = A % B;

    // 输出算式和结果
    std::cout << "和: " << A << " + " << B << " = " << sum << std::endl;
    std::cout << "差: " << A << " - " << B << " = " << difference << std::endl;
    std::cout << "积: " << A << " * " << B << " = " << product << std::endl;
    std::cout << "商: " << A << " / " << B << " (若B非零) = " << quotient << std::endl;
    std::cout << "模: " << A << " % " << B << " = " << modulus << std::endl;

    return 0;
}