C Program to find length of string without using Library function

[Basavaraj]

#include
#include
void main()
{
  int length( char *p ); // Function prototype.
  char *ptr;  // char pointer to read the string.
  int len;    // variable in which length is stored.
  clrscr();
  printf("Enter a string : ");
  gets( ptr ); // reading string from keyboard
  len=length( ptr ); // string is passed as argument to function( funcation call)
  printf("Length of string is : %d",len); // displaying the result.
  getch();

}


int length( char *p )  // Function definition
{
  int len=0;
  
  while( *p )
  {
  len++;
  p++;
  }
  return(len);

}

This problem is solved by defining out own function to find the length of string. here i have used char pointer to read the string.
using the concept of pointer we could solve the problem easily.

the while loop while( *P ) { len++; } gets executed repeatedly until it encounters null char which is usually present at the end of the string. the *p is written to fetch char from its pointer it is known as indirection operator,after fetching the char the pointer is incremented using the statement p++ which will make the pointer to point to the next char.

[Satish]

Sir, edit the post and use these syntax to format it to look better.

Syntax For Writing Your Program Code On This Forum

don’t forget about the replacement strings of html while writing the code.

[Author]

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