How to input 2 strings and compare them?

CODE

How to input 2 strings and compare them?

//Write a program to input 2 strings and compare them…

int main()

{

    char a[20],b[20];

    int i,j,k;

    printf("\n password:");

    gets(a);

    printf("\n confirm password:");

    gets(b);

    for(i=0;a[i]!='\0';i++);

    for(j=0;b[j]!='\0';j++);

    if(i==j)

    {

        int l=0;

        for(k=0;k<i;k++)

        {

            if(a[k]!=b[k])

            {

                l++;

                break;

            }

        }

        if(l==0)

            printf("\n WELCOME!!!");

        else

            printf("\n Sorry ! Password is not matching");

    }

    else

        printf("\n Sorry ! Password is not matching");

}

Output:

password:123456789

 confirm password:123456789

 WELCOME!!!