C Character Comparison

C Program to compare characters

This C program reads the characters as input and compares the characters to find both are equal or not (greater than or smaller than).

#include<stdio.h>                                                                
                                                                                
void main()                                                                     
{                                                                               
 char ch1, ch2;                                                                 
 printf("Enter characters: ");                                                  
 scanf("%c%c",&ch1, &ch2);                                                      
                                                                                
 if(ch1 == ch2)                                                                 
 {                                                                              
    printf("Characters are equal!");                                            
 }                                                                              
 else if(ch1 > ch2)                                                             
 {                                                                              
    printf("Character %c is greater than %c!", ch1, ch2);                       
 }                                                                              
 else                                                                           
 {                                                                              
    printf("Character %c is smaller than %c!", ch1, ch2);                       
 }                                                                              
}                                                                    
                                                                                  

Output:

$ cc char-comparision.c
$ ./a.out 
Enter characters: ad
Character a is smaller than d!
$ ./a.out 
Enter characters: aa
Characters are equal!
$ ./a.out 
Enter characters: db
Character d is greater than b!

We can also read the character input using getchar function instead of using scanf function.

#include<stdio.h>                                                                
                                                                                
void main()                                                                     
{                                                                               
 char ch1, ch2;                                                                 
 printf("Enter characters: ");                                                  
 ch1 = getchar();
 ch2 = getchar();
                                                                                
 if(ch1 == ch2)                                                                 
 {                                                                              
    printf("Characters are equal!");                                            
 }                                                                              
 else if(ch1 > ch2)                                                             
 {                                                                              
    printf("Character %c is greater than %c!", ch1, ch2);                       
 }                                                                              
 else                                                                           
 {                                                                              
    printf("Character %c is smaller than %c!", ch1, ch2);                       
 }                                                                              
}                                                                    
     

Output:

$ cc char-comparision.c
$ ./a.out 
Enter characters: ad
Character a is smaller than d!
$ ./a.out 
Enter characters: aa
Characters are equal!
$ ./a.out 
Enter characters: db
Character d is greater than b!

We ca

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