C program to compare two string with using pointer.












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C program to compare two string using pointer.




C program to compare two string pointer.




#include <stdio.h>

#define MAX 100
int compare(char * text1, char * text2);


int main()
{
    char text1[MAX], text2[MAX];
    int result;

    printf("\n Enter first string: ");
    gets(text1);
    printf("\n Enter second string: ");
    gets(text2);

    result = compare(text1, text2);

    if(result == 0)
    {
        printf("\n Both strings are equal.");
    }
    else if(result < 0)
    {
        printf("\n First string is lexicographically smaller than second.");
    }
    else
    {
        printf("\n First string is lexicographically greater than second.");
    }

    return 0;
}


/**
 * Compares two strings lexicographically.
 */
int compare(char * text1, char * text2)
{
    while((*text1 && *text2) && (*text1 == *text2)) { text1++; text2++; }

    return *text1 - *text2;
}


Output:

 
 Enter first string: computer

 Enter second string: computer

 Both or two strings are equal.



 Enter first string: computer

 Enter second string: Computer

 First string is lexicographically greater than second.



 Enter first string: computer

 Enter second string: Computer

 First string is lexicographically greater than second.




Exercise: 1
C program to compare two strings.






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