C/C++ strncmp - String Compare n Characters

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strcmp() - String Compare        strcpy() - String Copy        strcat() - String Concatenate

strncmp in C,C++ Programming - Syntax

strncmp is similar to strcmp() but the only difference is that it compares the characters up to the specified length.

Syntax:
	int strncmp(const char *s1,const char *s2,size_t number);

• strncmp returns zero value if both strings are same.
• strncmp returns negative value if string s1 is less than s2.
• strncmp returns positive value if s1 is greater than s2.

Example C, C++ program using strncmp()

#include<stdio.h>

#include<string.h>


main()
{
  char first[]={’W’,‘E’,‘L’,‘C’, ‘O’,‘M’,‘E’};
  char second[];
  int result;

  clrscr();
  printf(" The first string is %s ",first);
  printf(" \n Enter the second string ");
  scanf(" %s ",&second);

  result = strncmp(first,second,3 );
  if(result==0)
  {
  	printf(" \n The two strings are same upto 3 characters");
  }
  else
  {
  	printf(" \n The two strings are different");
  }
  return(0);
}

Output if the input is WELCO:

The first string is WELCOME
Enter the second string WELCO
The two strings are same upto 3 characters

Output if the input is WE:

The first string is WELCOME
Enter the second string WE
The two strings are different

strlen() - String Length strlwr() - String Lower       

strncat() - String n Concatenate        strncpy() - String n Copy

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strncat() - String n Concatenation        strlwr() - String Lower       

strncmp() - String n Compare       strncpy() - String n Copy