Using fflush

 #include<stdio.h>

#include<string.h>

int main(){

    char st1[34];

    char st2[34];

    char c;

    int i =0;

    printf("Enter the value of first string\n");

    scanf("%s", st1); 

    printf("Enter the value of second string character by character\n");

    

    while(c!='\n'){ 

        fflush(stdin);

        scanf("%c", &c); 

        st2[i] = c;

        i++;

    }

    st2[i-1]= '\0';

    printf("The value of st1 is %s\n", st1);

    printf("The value of st2 is %s\n", st2);

    printf("strcmp for these strings returns %d", strcmp(st1, st2));

    return 0;

}