You want to read a string (word) from the user into a character array name[20]. Which of the following scanf statements is correct and safe to avoid buffer overflow?

hard📝 Application Q15 of 15

C - Input and Output

You want to read a string (word) from the user into a character array name[20]. Which of the following scanf statements is correct and safe to avoid buffer overflow?

Ascanf("%s", name);

Bscanf("%s", &name);

Cscanf("%19s", name);

Dscanf("%20s", &name);

Step-by-Step Solution

Solution:

Step 1: Understand string input with scanf
To read a string into name, use %s without & because arrays decay to pointers.
Step 2: Prevent buffer overflow
Limit input length to 19 characters using %19s to leave space for the null terminator.
Final Answer:
scanf("%19s", name); -> Option C
Quick Check:
Limit string input length with %19s [OK]

Quick Trick: Use %19s for 20-char array to avoid overflow [OK]

Common Mistakes:

Using & with arrays in scanf
Not limiting input length causing overflow
Using wrong format specifier for strings

Master "Input and Output" in C

9 interactive learning modes - each teaches the same concept differently

Learn Why Deep Visual Try Challenge Project Recall Time

Want More Practice?

15+ quiz questions · All difficulty levels · Free

Free Signup - Practice All Questions

More C Quizzes

You want to read a string (word) from the user into a character array name[20]. Which of the following scanf statements is correct and safe to avoid buffer overflow?

Step 1: Understand string input with scanf

Step 2: Prevent buffer overflow

Final Answer:

Quick Check:

Want More Practice?