課程名稱︰計算機程式
課程性質︰大一必修
課程教師︰魏宏宇
開課學院：理學院
開課系所︰物理系
考試時間︰95.11.21
是否需發放獎勵金：是
（如未明確表示，則不予發放）
試題 :
1.(8%)When you write a C++ program with OOP,what do the following files do,and
how are they related?
(a)header file
(b)source file
(c)object file
(d)executable file
2.(20%)Write C++ statements to do the following tasks:
●You should include all required stantard library
●You can assume that all variables declared
●You can assume that we already have 'using' statement
(a)Input a whole sentence from keyboard and store the input into a string
named s1.
(b)Cut the 8 characters(3rd~10th)of string s1 and store them in a string
named s2.
(c)Display all positive odd number(奇數)between 100~200 in descending order
(遞減).
(d)Without using nested structure,check whether 10<x<30 is true.(寫一行程式碼
就可以了)
3.(25%)Define and implement a new class 'Triangle'.You should write the whole
C++ program(寫完整的程式)
●You should 'seperate interface from implementation'.
●The 'Triangle'class has 3 data members 'side1','side2','side3'.These data
members represent the 3 sides(邊) of the triangle.The data members should
be protected from outside access.
●The 'Triangle'class has a member functions 'checkSides' that check if the
3 sides of the triangle are valid(檢查是否兩邊和大於第三邊).The member
functions 'checkSides' will display 'A valid triangle!' on the screen,if
it's a valid triangle.If it's not valid,display 'Error!!!'.
●The class should be initialized with the constructor
●When an object is created,the program should automatically check the
validity of the triangle sides.
(a)In main function,declare a Triangle object named 't1' with initial value
[3.1 4.2 5]
(b)Create the class interface in a seperate file
(c)Create the class implementation in a seperate file
4.(18%)Programming with loops
(a)Display the following sequence '10 9 8 7 6 5 4 3 2 1 0' using 'for' loop
(b)Modify (a) with 'break' and 'continue' statements to diplay '10 7 6 5 4 3
2'
(c)Display '10 7 6 5 4 3 2' using 'do...while' statement and the sentinel-
controlled technique(Hint:use two sentinel/flag/signal values for
displaying and looping)
5.(15%)Assume x and y are declared as integer.Compute and display the
following results on the screen.
(a)x/y with 無條件進入
(b)x/y with 四捨五入
(c)x/y with 小數點(實數的除法)
6.(14%)What are the output of the following program when y value in Line 5 is
changed
●If you think there is error,just write 'ERROR' in your answer.
(a)y=5
(b)y=4
(c)y=3
(d)y=2
(e)y=1
(f)y=0
(g)y=-1
----------------------------------------------------------------------------
......some codes......
int x,y,z;
y=5; //Line5
z=2;
x=y;
switch(x)
{
z*=2;
case 5:
y++;
++x;
cout<<"Cout1:"<<x<<endl;
case 4:
y=(x==4)
cout<<"Cout2:"<<y<<endl;
break;
case 3:
case 2:
cout<<"Cout3:"<<z<<endl;
break;
case 1:
cout<<"Cout4:"<<++x<<endl;
break;
case 0;
break;
default:
cout<<"Cout5:"<<z<<endl;
break;
}
......some more codes......
----------------------------------------------------------------------------
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