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A string is a group of characters ended with null character. It is also known as array
of characters.
Declaration
char name_of_the_string[size];
where name of the string must be valid identifier & size must be an integer constant
Most useful functions available inside string.h header file
- strcpy()
This function copies one string into another string.
Format: strcpy(s1,s2)
where s1 is a string variable and s2 is a string variable or string constant.
e.g. strcpy("Hello",s1);
will copy Hello to string variable s1.
Format: strcpy(s1,s2)
where s1 is a string variable and s2 is a string variable or string constant.
e.g. strcpy("Hello",s1);
will copy Hello to string variable s1.
- strlen()
It counts the number of characters including null in the given string.
e.g. cout<<strlen("c++");
Output: 4
e.g. cout<<strlen("c++");
Output: 4
- strcmp()
Format: strcmp(s1,s2);
This function will return 0 if two strings are equal, -1 if 1st string is smaller than 2nd and 1 if 1st string is greater than 2nd
This function is case sensitive & compares two strings by ASCII value of the characters.
This function will return 0 if two strings are equal, -1 if 1st string is smaller than 2nd and 1 if 1st string is greater than 2nd
This function is case sensitive & compares two strings by ASCII value of the characters.
- strrev()
It prints given string into its reverse order
e.g. cout<<strrev("abc");
Output: cba
e.g. cout<<strrev("abc");
Output: cba
- strcat()
This function add two strings.
Format: strcat(s1,s2)
e.g. cout<<strcat("abc","xyz");
Output:abcxyz
Format: strcat(s1,s2)
e.g. cout<<strcat("abc","xyz");
Output:abcxyz
- strupr()
It converts given string in uppercase.
Format: strupr(s1)
where s1 can be a string variable or a string constant.
Format: strupr(s1)
where s1 can be a string variable or a string constant.
- strlwr()
It converts given string in lowercase. Format is same as that of strupr().
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Edited by livepcportal, 22 August 2009 - 03:52 PM.
