Write a program to print 1 20 in an output file out txt Each

Write a program to print 1 20 in an output file \"out txt\" Each number in the text file should be in a new line Write a program that determines whether a pi\\ en \\ear is a leap year or not Leap years are years in which February has 29 days Your program will ask. the user to enter a year continuously If the year entered is a leap sear your program will write the year in a txt file \"leapvear txt\", else the program will write the year in another txt tile \"notleapyear txt\" The user will have the option to exit the program by typing \'-1\'. Each year m the text files should be in .a new line Enter the following numbers to test 2000, 1800, 2008, 1900, 2009, 2013, 2 400, 2500 Create a txt file called \"year.txt\" that reads and writes all the contents of leapyear.txt and notleapyear.txt respectively.

Solution

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

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

int main()
{
FILE *fs1, *fs2, *ft;

char ch;

fs1 = fopen(\"leapyear.txt\",\"r\"); //open file leapyear.txt in read mode
fs2 = fopen(\"notleapyear.txt\",\"r\"); //open file notleapyear.txt in read mode

if( fs1 == NULL) { //print error and exit if leapyear.txt is cannot be opened
printf(\"Unable to open file leapyear.txt\ \");
return 0;
}

if( fs2 == NULL) { //print error and exit if notleapyear.txt is cannot be opened
printf(\"Unable to open file notleapyear.txt\ \");
return 0;
}



ft = fopen(\"year.txt\",\"w\"); //open file year.txt in write mode

if( ft == NULL) { //print error and exit if year.txt is cannot be created in write mode
printf(\"Error while creating file year.txt for writing.\ \");
return 0;
}

while( ( ch = fgetc(fs1) ) != EOF ) //get each char from first file and put(write) to new file
fputc(ch,ft);

while( ( ch = fgetc(fs2) ) != EOF ) //get each char from second file and put(write) to new file
fputc(ch,ft);

printf(\"Two files were merged into year.txt file successfully.\ \");

fclose(fs1); //close all opened files
fclose(fs2);
fclose(ft);

return 0;
}

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

OUTPUT:

sh-4.3$ cat lsh-4.3$ cat leapyear.txt   
1990   
2000   

sh-4.3$ cat notleapyear.txt
2003   
2005   

sh-4.3$ main   
Two files were merged into year.txt file successfully.   
  
  
sh-4.3$ cat year.txt   
1990   
2000   
2003   
2005