StringFunctions.h

/* 
str – string to search
searchCharacter – character to look for
return type - int : count for the number of times that character was found
*/
int numberOfCharactersInString(char *str, char searchCharacter);

/* 
source - source string
return type - int : 0 on success
*/
int removeNonAlphaCharacters(char *source);

/* 
source - source string
return type - int : length of string
*/
int lengthOfString(char *source);

/* 
str1 – string to concatenate to (resulting string)
str2 – second string to concatenate from
return type - int : 0 on success
*/
int strConcat(char *str1, char *str2);

/* 
source – string to copy from
destination – second string to copy to
return type - int : 0 on success
*/
int strCopy(char *source, char *destination);

/* 
source - source string
from - starting index from where you want to get substring
n - number of characters to be copied in substring
target - target string in which you want to store targe string
return type - int : 0 on success
*/
int substring(char *source, int from, int n, char *target);