Basic C Knowledge Exercise

Insert the missing parts of the code:

int ??? ( ) {
??? ("Hello World");
return 0;
}

PS. Put commas if answers are two or more (e.g. alpha, beta)

(a)  

Insert missing special characters in writing comments in C:

??? This is a single-line comment
??? This is a multi-line comment ???

• // Single-line
  // Multi-line //

• // Single-line
  ** Multi-line **

• // Single-line
  /* Multi-line */

• /* Single-line
  /* Multi-line */

Create a variable named myNum and assign the value 47 to it.

?? ??? = ??;

(a)  

Which is the correct specifier to output the value of myNum?

int myNum = 15; printf("???", myNum);

• %c

• d%

• %ld

• %d

Display the sum of 17 + 33, using two variables: a and b.

??? ?? = ???;
int b = 33;
printf("%d", a + b);

(a)  

Which code parts is needed to create three variables of the same type?

??? myNum1 = 10 ? myNum2 = 15 ? myNum3 = 25;
printf("%d", myNum1 + myNum2 + myNum3);

• int and comma (,)

• int and semi-colon (;)

• int and colon (;)

• int and ampersand (&)

Add the correct data type for the following variables:

??? myNum = 6;
??? myFloatNum = 3.1419;
??? myLetter = 'D';

PS. Put commas for multiple answers (e.g. alpha, beta)

(a)  

Which correct specifier is needed to print the value of the following variable:

char myLetter = 'D';
printf("???", myLetter);

• %d

• %f

• %a

• %c

Make the output of this code to only show one digit after the decimal point:

float myScore = 3.141592653589793238462643383279502884197;
printf("???", piValue);

(a)  

float sum = ??? 2 / 1; printf("%.1f", sum);

Which type conversion is needed to make sure that the result is 1.5, and not just 1.

• (float)

• (double)

• (1float)

• (1double)

Answer explanation

now ko lang din to nalaman. kung nasagot mo nang tama, edi nizzcceuue *clap clap

legit explanation:

(float) tells the compiler to treat that integer as a floating-point number for the operation thus the result would be a floating-point instead of an integer.

thus 1.5 is displayed instead of 1.

note that this is important in division operations.