NIU CSCI 240 Exam 1 Study Guide Questions And Answers Latest Updates
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Course
NIU CSCI 240
Institution
NIU CSCI 240
cin >> i; - ️️The code above states that there will be a value inputed (allows the
user to input a value)/ associated with i later on. For example it could be used in a way
such as i++, if the input value of i is 1 the ++ will incrementally increase i by 1 thus
making i 2.
assuming th...
NIU CSCI 240 Exam 1 Study Guide
cin >> i; - ✔️✔️The code above states that there will be a value inputed (allows the
user to input a value)/ associated with i later on. For example it could be used in a way
such as i++, if the input value of i is 1 the ++ will incrementally increase i by 1 thus
making i 2.
assuming that C and F are both declared as doubles, and F has a valid value. -
✔️✔️What's wrong with it is you're always going to get 0 because it is integer division
and 5 does not go into 9 evenly. You can fix it by typecasting or writing 5.0/9 (that will
give you the remainder).
main() marks the beginning of a C++ program. What C++ reserved word precedes it? -
✔️✔️int
Most lines in a C++ program end with a - ✔️✔️; (semi-colon)
According to the lecture notes, the two main conceptual components of a program are
_____ and _____. - ✔️✔️data and instructions
Modify (rewrite) the following instruction so that the subtraction is evaluated first:
i = a * b / c - d; - ✔️✔️i= a*b/(c-d);
About how many decimal places of accuracy does a float have? - ✔️✔️6
Suppose you have two integer variables (named num and sum) with valid values. Write
a single cout instruction to display them as follows:
num is __
sum is __
the underscore characters will show the actual values in num and sum - for example:
num is 4
sum is 24 - ✔️✔️cout<<"num is 4"<<num<<endl<<"sum is 24"<<sum;
The formula for converting a Fahrenheit temperature to Centigrade is 5/9(F - 32). What
is wrong with writing it in C++ as
C = 5/9 * (F - 32);
, About how many decimal places of accuracy does a double have? - ✔️✔️12
What instruction will display data on the screen from a C++ program? - ✔️✔️cout
Name two libraries that should be #include'd at the top of a C++ program. -
✔️✔️#include <iostream>
#include <iomanip>
Explain in detail what the following instruction does (assuming i is declared as int):
Select the three control structures that (along with sequence) will be studied in this
course. - ✔️✔️int
decision
repetition/looping
#include
branch and return/function calling
Name the 3 C++ statements used to create a loop. - ✔️✔️while
for
do while
Write a for loop to display the first 5 multiples of 10 on one line. For example: 10 20 30
40 50 - ✔️✔️for(x=1; x<=5;x++)
cout<<x*10<< " ";
If a read-loop is written to process an unknown number of values using the while
construct, and if there is one read before the while instruction there will also be one -
✔️✔️at the bottom of the body of the loop
Write a decision statement to test if a number is even or not. If it is, print "even". If it is
not, add 1 to it and print "it was odd, but now it's not". - ✔️✔️if(num%2==0)
cout<<"even";
else
{
num++;
cout<<"It was was odd, but now it's not";
}
The three basic loop statements in C++ are while, _______, and _________. - ✔️✔️for
do while
What will the following code fragment print?
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