. . . . . . . . macro must be called before using . . . . . . . . and . . . . . . . .
A. va_arg, va_end and va_start
B. va_start, va_end and va_arg
C. va_end, va_arg and va_start
D. v_arg, v_end and v_start
Answer: Option B
This Question Belongs to C Program >> Standard Library Functions
Which standard library function is used to calculate the length of a string in C?
A. strlen()
B. strlength()
C. stringlen()
D. strsize()
What is the purpose of the 'printf' function in C?
A. To print formatted text to the standard output
B. To read text from the standard input
C. To open a file
D. To close a file
Which library should be included to use the 'sqrt' function in C?
A. math.h
B. stdlib.h
C. cmath.h
D. algorithm.h
What does the 'strcmp' function in C do?
A. Compares two strings and returns an integer indicating their relationship
B. Copies one string to another
C. Concatenates two strings
D. Searches for a substring
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