Question:
Consider the following C function definition.
\begin{verbatim}
int fX(char *a){
char *b = a;
while(*b)
b++;
return b - a;
}
\end{verbatim}
Which of the following statements is/are TRUE?
Consider the following C function definition.
\begin{verbatim}
int fX(char *a){
char *b = a;
while(*b)
b++;
return b - a;
}
\end{verbatim}
Which of the following statements is/are TRUE?
Show Hint
String literals and character arrays can be used as inputs to functions that calculate string lengths, provided they are properly null-terminated.
Updated On: Jan 23, 2025
- The function call \texttt{fX("abcd")} will always return a value
- Assuming a character array \texttt{c} is declared as \texttt{char c[] = "abcd"} in \texttt{main()}, the function call \texttt{fX(c)} will always return a value
- The code of the function will not compile
- Assuming a character pointer \texttt{c} is declared as \texttt{char *c = "abcd"} in \texttt{main()}, the function call \texttt{fX(c)} will always return a value
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The Correct Option is A
Solution and Explanation
Option (A): The string literal \texttt{"abcd"} is valid, and the function calculates the length of the string by iterating until the null character. Hence, Option (A) is correct.
Option (B): The character array \texttt{c} is a valid input for the function, and the function correctly calculates the length of the string. Hence, Option (B) is correct.
Option (C): This is false. The code is valid and will compile without any issues. Hence, Option (C) is incorrect.
Option (D): The character pointer \texttt{c} pointing to the string literal \texttt{"abcd"} is valid, and the function calculates the length of the string correctly. Hence, Option (D) is correct. Final Answer: \[ \boxed{\text{(A), (B), (D)}} \]
Option (B): The character array \texttt{c} is a valid input for the function, and the function correctly calculates the length of the string. Hence, Option (B) is correct.
Option (C): This is false. The code is valid and will compile without any issues. Hence, Option (C) is incorrect.
Option (D): The character pointer \texttt{c} pointing to the string literal \texttt{"abcd"} is valid, and the function calculates the length of the string correctly. Hence, Option (D) is correct. Final Answer: \[ \boxed{\text{(A), (B), (D)}} \]
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