Using - C
  
 Source Code
  

    
#include<stdio.h>
#include<string.h>
     
void main() {
  char str1[1024], str2[1024];
  printf("Enter String-1:  ");
  gets(str1);
  printf("Enter String-2:  ");
  gets(str2);

 	if(strcmp(str1,str2) == 0) {
 		printf("Strings are equal!");
	 }
	 else if(strcmp(str1,str2) < 0) {
	 	printf("First non-matching character in string-1 is lower (in ASCII) than that of string-2 !");
	 }
	 else {
	 	printf("First non-matching character in string-1 is greater (in ASCII) than that of string-2 !");
	 }
}
    

Enter String-1:  Hello
Enter String-2:  hello
First non-matching character in string-1 is lower (in ASCII) than that of string-2 !

        
Using - C++
        
 Source Code
        

        
#include<iostream>
#include<string.h>
using namespace std;

int main() {
	string str1, str2;
	cout<< "Enter String-1:  ";
	getline(cin,str1);
	cout<< "Enter String-2:  ";
	getline(cin,str2);

 	if(str1.compare(str2) == 0) {
 		cout<< "Strings are equal!";
	 }
	 else if(str1.compare(str2) < 0) {
	 	cout<< "First non-matching character in string-1 is lower (in ASCII) than that of string-2 !";
	 }
	 else {
	 	cout<< "First non-matching character in string-1 is greater (in ASCII) than that of string-2 !";
	 }

	return 0;
}
      

Enter String-1:  welcome
Enter String-2:  welcome
Strings are equal!