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C Exercises: Calculate the length of the string

C Pointer : Exercise-10 with Solution

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

Pictorial Presentation:

C Exercises: Pictorial: Calculate the length of the string.

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:

Flowchart: Calculate the length of the string

C Programming Code Editor:

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Next: Write a program in C to swap elements using call by reference.

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C Programming: Tips of the Day

How to format strings using printf() to get equal length in the output?

You can specify a width on string fields, e.g.

printf("%-20s", "initialization..."); 

And then whatever's printed with that field will be blank-padded to the width you indicate.

The - left-justifies your text in that field.

Ref : https://bit.ly/34DMOc3