How do I create a c function that takes two strings and compared them character

Question

How do I create a c function that takes two strings and compared them character by character from left to right. And it returns the difference between the ascii value of the first mismatched characters, otherwise zero if both strings are equal. And printf a statement suggesting which is bigger? Without using array notation or string functions How do I create a c function that takes two strings and compared them character by character from left to right. And it returns the difference between the ascii value of the first mismatched characters, otherwise zero if both strings are equal. And printf a statement suggesting which is bigger? Without using array notation or string functions

Explanation / Answer

Please find the required program along with its output. Please see the comments against each line to understand the step.

#include "stdio.h"

int diff(char *arr1, char *arr2){
   int i, d = 0;   //initialize diff as 0
   for( i=0; i<*(arr1+i)!=NULL;i++){   //iterate over each element in arr1
       if(*(arr1+i) != *(arr2+i)){   //if the element is different
           d = ((int)*(arr1+i)) - ((int)*(arr2+i));   //get the ascii difference of two characters
           return d;   //return the difference
       }
   }
   return 0;   //if no difference is found, then return 0
}

int main(void) {

   char *s1 = "hay", *s2 = "hai";   //initialize 2 strings

   int d = diff(s1,s2);   //call the diff method
  
   if(d > 0)   //print the message
       printf("%s is bigger. Diff = %d",s1,d);
   else if(d < 0)
       printf("%s is bigger. Diff = %d",s2,d);
   else
       printf("Both are equal. Diff = %d",d);

return 0;
}

-----------------------------------------------

OUTPUT:

Related Questions

Navigate

• Browse (All)
• Browse H
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.