C Tutorials

Basics in C

Introduction of C
Keywords in C
Data Types in C
First Program in C
Add Two Numbers in C
Input from User in C
String Input from User in C

Decision Making

If Statement in C
If and Else Statement in C
AND Operator in If Statement in C
Switch Statement in C

Loops

While Loop in C
While Loop User Input in C
Triangle using While Loop in C
For Loop in C
For Loop using Continue in C
Do While Loop in C
Triangle using Do While Loop in C

Functions

Function in C
Calling Function inside Function in C
Passing Arguments to Function in C
Passing String Arguments to Function in C
Passing Arguments to Function and Return in C
Calling Function of .h File in C

Arrays

Array in C
String Array in C
User Input in Array in C
Find Min and Max Number in Array in C
Two Dimensional Array in C
User Input using Gets and Puts in C

Pointers

Pointers in C
Working with Pointers in C
String Functions in C

Structure

Structure in C
Passing Arguments in Structure in C
Passing Arguments and Return in Structure in C
Constructor in Structure in C

Data and Time

Date and Time in C

File Handling

Read and Write Text File in C
Deleting File in C
Create and Delete Directory in C
File Opening Modes in C

More Examples

Encryption and Decryption in C
Open Application in C
Defining Startup and Exit in C
Working with Define in C
View Address of Variable in C
Shut Down Computer in C

Library Functions

Precedence Table in C
Arithmetic Functions in C
IO Functions in C
Disk IO Functions in C
Basic Data Types Meanings in C
Printf Format Specifiers in C
Library Header Files in C

String Functions in C

String functions in C programming with descriptions are listed below. You can use the following function to work with String values including find, convert, append, etc.

String Functions

Function	Use
strlen	Finds length of a string.
strlwr	Converts a string to lowercase.
strupr	Converts a string to uppercase.
strcat	Appends one string at the end of another.
strncat	Appends first n characters of a string at the end of another.
strcpy	Copies a string into another.
strncpy	Copies first n characters of one string into another.
strcmp	Compares two strings.
strncmp	Compares first n characters of two strings.
strcmpi	Compares two strings without regard to case ('i' denotes that this function ignores case).
stricmp	Compares two strings without regard to case (identical to strcmpi).
strnicmp	Compares first n characters of two strings without regard to case.
strdup	Duplicates a string.
strchr	Finds first occurrence of a given character in a string.
strrchr	Finds last occurrence of a given character in a string.
strstr	Finds first occurrence of a given string in another string.
strset	Sets all characters of string to a given character.
strnset	Sets first n characters of a string to a given character.
strrev	Reverses string.

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