Home › Forums › Programming › C Program to find length of string without using Library function
Tagged: c, functions, sting, string lenght
- This topic has 1 reply, 2 voices, and was last updated 12 years, 9 months ago by Satish.
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- January 16, 2012 at 5:30 am#1136BasavarajMember
#include<stdio.h> #include<conio.h> 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.
January 16, 2012 at 5:49 am#1140SatishKeymasterSir, edit the post and use these syntax to format it to look better.
don’t forget about the < and > replacement strings of html while writing the code.
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