string functions

Question 1

What are examples of array initialization in C and how does it differ from Java?

Answer 1

int a[10]; int a[] = {1,2,3} in Java an array was descried like this: int[] a = {1,2,3}; int a = new int[]; AND you don’t need to use new

Question 2

What is the terminating character for Strings? (in C) How does it affect the size of the char array?

Answer 2

‘\0’ The character uses up one of the spaces of the length

Question 3

What does int strlen(s) do?

Answer 3

returns length of string s unit \0

Question 4

What does strcpy(dst, src) do?

Answer 4

copies string characters from src into dst

Question 5

What does: char* strdup(s), do?

Answer 5

allocates and returns a copy of s

Question 6

what does: strcat(s1, s2), do?

Answer 6

Concatenates s2 onto the end of s1 (puts \0)

Question 7

What does: int strcmp(s1, s2), do?

Answer 7

returns < 0 if s1 comes before s2 in ABC order returns > 0 if s1 comes after s2 in ABC order returns 0 if s1 and s2 are the same

Question 8

what does: int strchr(s, c), do?

Answer 8

returns index of first occurrence of c in s

Question 9

What does: int strstr(s1, s2), do?

Answer 9

returns index of first occurrence of s2 in s1

Question 10

What does: char* strtok(s, delim), do?

Answer 10

breaks apart s into tokens by delimiter delim

Question 11

what is the difference with: strncpy, strncat, strncmp

Answer 11

lengh-limited version of above the same functions?