华南师大计算机学院软件工程专硕机试（2017考研）
前言
前两天考研公布成绩，看成绩结合群里人的分数大概率是进复试了，于是就翻出之前的机试题来看下难度，查缺补漏再去找一些类似的题目。
所有题目代码用C++编写
题目均为回忆版
1.输入一个数字，为其高，一个符号*，输出该符号组成的平行四边形形状源码
#include
using namespace std;
int main(){
int n;
cout<>n;
for(int i=0;i=0;j--){
cout<<" ";
}
for(int k=0;k<n;k++){
cout<<"*";
}
cout<<endl;
}
return 0;
}
结果：
please input a number:5
*****
*****
*****
*****
*****
二、是猴子吃桃问题，每天都吃剩下的一半，再多吃一个，直到第十天剩下一个桃子，问第一天猴子有多少个桃。
源码：
(递归)
#include
using namespace std;
int function(int i){
if(i==1)
return 1;
return 2*(function(i-1)+1);
}
int main()
{
cout<<function(10)<<endl;
}
(for循环)
#include
using namespace std;
int main(){
int number = 1; //第十天的数量
for(int i=0;i<9;i++){
number = (number + 1) * 2;
}
cout<<number<<endl;
return 0;
}
结果：
1534
三、输入一系列的数字，输出他们正负数个数，输入0截止，要用函数实现
源码
#include
using namespace std;
int LargerThanZero = 0; //大于零的个数
int SmallerThanZero = 0; //小于零的个数
void Function(int n){
if(n>0)
LargerThanZero++;
else if(n<0)
SmallerThanZero++;
}
int main(){
cout<>n;
while(n!=0){
Function(n);
cin>>n;
}
cout<<"Stop"<<endl;
cout<<"Larger Than Zero:"<<LargerThanZero<<endl;
cout<<"Smaller Than Zero:"<<SmallerThanZero<<endl;
}
结果：
please input numbers:1 9 2 3 -7 6 -6 -1 0
Stop
Larger Than Zero:5
Smaller Than Zero:3
四、是用一个类来记录学生成绩和他班级，里面有几个函数，静态成员和动态成员都有
因为题目是回忆版的，题目概述不清，根据之前看过的教材大概自己设置几个函数与静态成员
#include
#include
using namespace std;
class Student{
public:
Student(string n,int c,double sco){
name=n;
Class=c;
score=sco;
num++;
total+=sco;
average=total/(double)num;
}
static double Got_Total(){
return total;
}
static int Got_num(){
return num;
}
static double Got_Ave(){
return average;
}
void display(); //显示个人信息
void Change_Score(double n); //更改分数
void Change_Class(int c); //更改班级
private:
string name;
int Class;
double score;
static double total;
static int num;
static double average;
};
void Student::display(){
cout<<"Name:"<<name<<endl;
cout<<"Class:"<<Class<<endl;
cout<<"Score:"<<score<<endl;
}
void Student::Change_Class(int c){
Class=c;
cout<<"After Change:"<<endl;
display();
}
void Student::Change_Score(double s){
total-=score;
score=s;
total+=score;
average=total/(double)num;
cout<<"After Change:"<<endl;
display();
}
double Student::total = 0;
int Student::num = 0;
double Student::average = 0;
int main(){
Student Stu[5]={
Student("Obama",1,99.0),
Student("Mike",1,77.5),
Student("Jackson",2,87.0),
Student("Cherry",3,93.5),
Student("Oscar",4,89.0)
};
for(int i=0;i<5;i++)
{
cout<<endl;
Stu[i].display();
}
cout<<endl<<"Total:"<<Student::Got_Total()<<endl;
cout<<"Numbers of Student:"<<Student::Got_num()<<endl;
cout<<"Average:"<<Student::Got_Ave()<<endl;
cout<<endl;
Stu[0].Change_Score(100);
cout<<endl<<"Total:"<<Student::Got_Total()<<endl;
cout<<"Numbers of Student:"<<Student::Got_num()<<endl;
cout<<"Average:"<<Student::Got_Ave()<<endl;
}
结果：
Name:Obama
Class:1
Score:99
Name:Mike
Class:1
Score:77.5
Name:Jackson
Class:2
Score:87
Name:Cherry
Class:3
Score:93.5
Name:Oscar
Class:4
Score:89
Total:446
Numbers of Student:5
Average:89.2
After Change:
Name:Obama
Class:1
Score:100
Total:447
Numbers of Student:5
Average:89.4
五、重载+，++，=等简单运算符
这题跟上面一样也是不太清楚，所以我以时间为例写一个重载运算符
#include
using namespace std;
class Time{
private:
int sec;
int min;
public:
Time(int m=0,int s=0){
min=m;
sec=s;
}
void operator = (Time a){
min=a.min;
sec=a.sec;
}
void display(){
cout<<min<<":"<<sec<=60)
{
t.sec-=60;
t.min++;
}
return t;
}
Time Time::operator++(){
this->sec++;
if(this->sec>=60)
{
this->sec-=60;
this->min++;
}
return *this;
}
Time Time::operator++(int){
Time t=*this;
this->sec++;
if(this->sec>=60)
{
this->sec-=60;
this->min++;
}
return t;
}
int main(){
Time a;
cout<<"a:";
a.display();
cout<<"++a:";
++a;
a.display();
cout<<endl;
cout<<"a++ (b) :";
Time b=a++;
b.display();
cout<<"a:";
a.display();
cout<<"a+b:";
Time c;
c=a+b;
c.display();
}
结果：
a:0:0
++a:0:1
a++ (b) :0:1
a:0:2
a+b:0:3
作者：SampsonTse
