how to compare two strings in c language without using strcmp | CTechnotips

C program to compare two strings without using string functions.

#include<stdio.h>

int stringCompare(char[],char[]);

void main(){

        char str1[100],str2[100];
        int compare;

        printf("Enter first string: ");
        scanf("%s",str1);

        printf("Enter second string: ");
        scanf("%s",str2);

        compare = stringCompare(str1,str2);

        if(compare == 1)
        {
         printf("Both strings are equal.");
        }
        else
        {
            printf("Both strings are not equal");
        }
        getch();
}

int stringCompare(char str1[],char str2[]){

        int i=0,flag=0;

        while(str1[i]!='\0' && str2[i]!='\0')
       {

            if(str1[i]!=str2[i])
            {
                     flag=1;
                     break;
             }
             i++;
        }

        if (flag==0 && str1[i]=='\0' && str2[i]=='\0')
       {
             return 1;
       }
        else
       {
             return 0;
       }
}

Output:

Enter first string: ctechnotips.blogspot.com
Enter second string: ctechnotips.blogspot.com
Both strings are equal.