Input a password from the user and check if it has a char, alphabet and digit

Question

My doubt is that, the program works fine if I enter a password that fills the array. However if I enter a password such as \"apple25\", I think it counts the blank spaces in the

Answer 1

• Point 1. Always initialize your automatic local variables. Saves you from accidentally accessing un-initialized value.

  char arr[10] = {0};
  

• Point 2. Always limit your input length. Saves you from running into undefined behavior by overrunning the allocated memory by longer-than-expected input.

  scanf("%9s",arr );
  

• Point 3. Use strlen() to loop over only the valid part of input.