[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fLiwGZpYmqvXsj5Ul7EPZOI9fgaRJZc6cnxRrdfqYafA":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":8,"question":12,"related":13,"source":19,"type":20},[],"2025-12-18 10:52:40",271813704,[],{"courseId":9,"courseImg":10,"courseName":11},"53e1d2ef4961cca8eea3e23969ad2cb9","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F03a579384a6dc297c89809b582fcc767.png","默认课程","问题: 请写出十进制数 42 的8位原码、反码和补码.为什么对于正数来说,这三者是一样的",[14,21,26,31,36,41,44,49,54],{"answer":15,"createTime":5,"id":16,"options":17,"question":18,"source":19,"type":20},[],271813699,[],"#include <iostream>using namespace std;int main() { int a = 5; double b = 2.5; char c = 'A'; cout << a + b + c << endl; return 0; } 问题: 上述程序的输出结果是什么?请解释原因","v1",4,{"answer":22,"createTime":5,"id":23,"options":24,"question":25,"source":19,"type":20},[],271813700,[],"int i = 3;int j = i++ + ++i; 问题: 执行上述代码后,变量j的值是多少?请详细说明计算过程",{"answer":27,"createTime":5,"id":28,"options":29,"question":30,"source":19,"type":20},[],271813701,[],"int x = 5, y = 10, z = 15; bool result = (x < y) && (y < z) || (x + y == z)",{"answer":32,"createTime":5,"id":33,"options":34,"question":35,"source":19,"type":20},[],271813702,[],"int a = 10; a *= 2 + 3",{"answer":37,"createTime":5,"id":38,"options":39,"question":40,"source":19,"type":20},[],271813703,[],"问题: 已知 unsigned char a = 5; 和 unsigned char b = 3;,请计算 a & b(按位与)、a | b(按位或)和 a ^ b(按位异或)的结果(用十进制表示)",{"answer":42,"createTime":5,"id":6,"options":43,"question":12,"source":19,"type":20},[],[],{"answer":45,"createTime":5,"id":46,"options":47,"question":48,"source":19,"type":20},[],271813705,[],"请写出十进制数 -20 的8位原码、反码和补码.请写出详细的转换步骤",{"answer":50,"createTime":5,"id":51,"options":52,"question":53,"source":19,"type":20},[],271813706,[],"问题: 已知一个8位二进制补码为 1110 1101,请问它对应的十进制数是多少?请写出计算过程",{"answer":55,"createTime":5,"id":56,"options":57,"question":58,"source":19,"type":20},[],271813707,[],"int a = 4, b = 5, c = 6; int d = a * b \u002F c + c % b - a; 问题: 变量 d 的值是多少?请根据C++运算符优先级规则,分解计算步骤"]