Unit 3 I/O functions

Which of the following is the correct way to input an integer using scanf?

• scanf("%s", &num);

• scanf("%f", &num);

• scanf("%d", &num);

• scanf("%c", &num);

What is the correct format specifier to print a string in C using printf?

• %d

• %o

• %c

• %s

In the scanf function, why is the address-of operator (&) used?

• To specify the type of input

• To store the input in a variable

• To pass the variable's memory address

• To terminate the input

Which of the following is the correct way to print a floating-point number with 2 decimal places in C?

• printf("%.2f", num);

• printf("%2f", num);

• printf("%f.2", num);

• printf("%2f", num);

Which of the following format specifiers can be used to print an integer value in hexadecimal format?

• %o

• %i

• %x

• %d