C Exercises: Calculate the length of the string

C Pointer: Exercise-10 with Solution

Write a program in C to calculate the length of a string using a pointer.

Pictorial Presentation:

Sample Solution:

C Code:

#include <stdio.h>
int calculateLength(char*);
 
void main() 
{
   char str1[25];
   int l;
	printf("\n\n Pointer : Calculate the length of the string :\n"); 
	printf("---------------------------------------------------\n");
   
   printf(" Input a string : ");
   fgets(str1, sizeof str1, stdin);
   
   l = calculateLength(str1);
   printf(" The length of the given string %s is : %d ", str1, l-1);
   printf("\n\n");

}
 
int calculateLength(char* ch) // ch = base address of array str1 ( &str1[0]  )
{
   int ctr = 0;
   while (*ch != '\0') 
   {
      ctr++;
      ch++;
   }
   return ctr;
}

Sample Output:

 Pointer : Calculate the length of the string :                                                               
---------------------------------------------------                                                           
 Input a string : w3resource                                                                                  
 The length of the given string w3resource                                                                    
 is : 10

Flowchart:

C Programming Code Editor:

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