Example 74: Common String Functions Implementation

Problem

Write a program to implement the following functions:

1. strlen: Finds the length of the string
2. strcpy: Copies contents of one string to another string
3. strcat: Appends one string at the end of another string
4. strcmp: Compares two strings to find whether they are identical or not

Example

Suppose we have the following four strings:

• s1[] = “kicit”
• s2[] = “Nagpur”
• s3[20] = “”
• s4[] = “kicit”

These strings will be used as inputs for the examples given in the table below.

Function	Input	Output
strLen	s1	5
strCpy	s3, s1	kicit
strCat	s3, s2	kicitNagpur
strCmp	s1, s2	29
strCmp	s1, s4	0

Try it yourself - strlen()

Try to calculate the length of a given string on your own in the code widget below. If you get stuck, you can always refer to the solution provided.