Question

Write a c program

CH-12 TEXT FILES EXERCISE 12-12 Write a program to read two files of the same length, and determine if they are equal. For example: if one of the file has the content 123 abc 45 bye! and the other has 123 abc 55 bye! then these files are not equal

Answer 1

#include<stdio.h>
#include<string.h>
#include<stdlib.h>

int areTheyEqual(FILE *fp1, FILE *fp2)
{
//getting characters in two files in two char variables a and b
char a=getc(fp1);
char b=getc(fp2);
//running loop until atleast one of them reaches end of file
while(a!=EOF && b!=EOF)
{

if(a!=b) return 0;//if two characters at any time are not equal returning 0
//again giving new values to a and b
a=getc(fp1);
b=getc(fp2);
}
//if one variable reaches end of line and other doesnot then the two files are not equal
if(a!=EOF &&b!=EOF) return 0;
//if it came here then the two files are equal so returning 1
return 1;
}
int main() {

//we shall open files in read only format
   FILE *fp1 = fopen("first.txt", "r");
FILE *fp2 = fopen("second.txt", "r");
//checking if any pointers are NULL
if (fp1 == NULL || fp2 == NULL)
{
printf("files did not opened");
exit(0);
}
//if the function returns 1 then they are equal else they are not equal
if(areTheyEqual(fp1,fp2)) printf("they are equal\n");
else printf("they are not equal\n");
//closing the two files
fclose(fp1);
fclose(fp2);
return 0;

}

#include<stdio.h> #include<string.h> #include(stdlib.h> 2 5 int areTheyEqual (FILE fp1, FILE fp2) 6 //getting characters in two files in two char variables a andb char a-getc(fp1); char b-getc(fp2); //running loop until atleast one of them reaches end of file while(a!-EOF&& b!-EOF) 16 12 13 14 15 16 17 18 if (a!-b) return 0;//if two characters at any time are not equal returning //again giving new values to a and b a-getc(fp1); b-getc(fp2); /lif one variable reaches end of line and other doesnot then the two files are not equal if (a!-EOF &&b!-EOF) return ; //if it came here then the two files are equal so returning 1 return 1 20 21 23 24 int main() 25 26 27 28 FILE fp2 fopen("second.txt", " 29 30 if (fp1·NULL 11 fp2 :: NULL) 31 32 //we shall open files in read only format FILE *fp1 fopen("first.txt", "r"); //checking if any pointers are NULL printf( "files did not opened"; exit(e); //if the function returns 1 then they are equal else they are not equal if (areTheyEqual (fp1,fp2)) printf("they are equal\n"); else printf("they are not equal\n"; //closing the two files fclose(fp1); fclose(fp2); 35 36 37 38 39 40

5 int areTheyEqual (FILE fp1, FILE fp2) 6 //getting characters in two files in two char variables a and b char a-getc(fp1); char b-getc(fp2); //running loop until atleast one of them reaches end of file while (a!-EOF&& b! EOF) 9 10 12ア 13 14 if(a!-b) return 0;//if two characters at any time are not equal returning //again giving new values to a and b a-getc(fp1); b-getc(fp2); 17 18 //if one variable reaches end of line and other doesnot then the two files are not equal if(a!-EOF &&b!-EOF) return 6; //if it came here then the two files are equal so returning 1 return 1 20 21 23 24 int main) ( 25 26 27 //we shall open files in read only format FILE fp1 fopen("first.txt", r) FILE fp2 fopen("second.txt", ""); //checking if any pointers are NULL if (fp1·NULL 11 fp2-NULL) 29 30 31 32 printf("files did not opened") exit(e); 35 //if the function returns 1 then they are equal else they are not equal if(areTheyEqual(fp1,fp2)) printf( they are equal\n") else printf("they are not equal\n); //closing the two files fclose(fp1); fclose(fp2); return e; 37 38 39 42 43

hey are not equal process returned θ (exe) execution time : 4.578 s ress any key to continue Projects iew: Curren Search: Symb GI

first - Notepad File Edit Format View Help 12: abc 45 bye!

second - Notepad File Edit Format View Help 123 abc 55 bye! ера
if you are satisfied please upvote or if you have any doubts post them in comment section happy learning