Question

Please write this in C.

Write this code in Visual Studio and upload your Source.cpp file for checking (1) Write a program to prompt the user for an output file name and 2 input file names. The program should check for errors in opening the files, and print the name of any file which has an error, and exit if an error occurs opening any of the 3 For example, (user input shown in caps in first line) Enter first input file nam DOESNOTEXIST.T Error opening input file: DOESNOTEXIST.T Enter first input file name: F1.TXT Enter second input file name: F2.TXT Enter output file name: .. Error opening output file: .. (2) As it reads the input files one word at a time, it should interleave the words of the files to write the output file and also write the interleaved words on standard output (the screen). It should continue until it reaches the ends of both files, as they may be unequal lengths Keep writing the longer file words after exhausting the shorter (3) Before the program exits, it should close all files, and print a count of the words written. 4) You will have to manually look at the output file to confirm the program ran correctly. Sample input files are listed below for your testing Copy/paste the text into new.txt files in the same folder as your source.cpp file, or your program won't be able to find them For example, (based on the 2 input files we provide you, with user input shown in caps) Enter first input file name F1.TXT Enter second input file name: F2.TXT Enter output file name: OUT.TXT Interleaved text: Copy some and then interleave these 2 text files. without losing any words. 13 words written. Sample input files which generated the above output: Copy and interleave 2 files some then these text without losing any words.

Answer 1

CODE:

#include <stdio.h>
#include<strings.h>

int main()
{
    //for counting the no of words
    int count=0;
    //variables for taking file name from user
    char file1[50],file2[50],file3[50];

    //variables for reading words from the 2 files
    char word1[100],word2[100];
  
    //file pointers for 2 input file and 1 output file
    FILE *f1,*f2,*f3,*out;
  
    //take file name from user
    printf("Enter first input file name: ");
    scanf("%s",file1);
  
    //open 1st file
    f1 = fopen(file1,"r");

    //if opening fails
    if(f1 == NULL)
    {
        //print message and exit
        printf("Error opening input file: %s",file1);
        exit(1);           
    }


    printf("Enter second input file name: ");
    scanf("%s",file2);
     f2 = fopen(file2,"r");

    if(f2 == NULL)
    {
         printf("Error opening input file: %s",file2);
            exit(1);           
    }

    printf("Enter output file name: ");
    scanf("%s",file3);
    //open output file in read mode to see that it can be opened
    f3 = fopen(file3,"r");
  
    if(f3 == NULL)
    {
      printf("Error opening output file: %s",file3);
      exit(1);           
    }
    //close the file opened in read mode
    fclose(f3);
  
    //reopen the output file in write mode
    out=fopen(file3,"w");

   printf("Interleaved text:\n");

   //read the input files till they both have words
   //run while loop till any of the files all words are read
    while(fscanf(f1,"%s",word1)!=EOF && fscanf(f2,"%s",word2)!=EOF)
   {       //display file1 word
           printf(" %s",word1);
           //increase the count value by 1
           count++;
            //write in output file
            fprintf(out," %s",word1);
          
           //display file 2 word
           printf(" %s",word2);
           //increase the count value by 1
           count++;
           //write in output file
            fprintf(out," %s",word2);
      
   }
  
    //the below two while loop will be executed if one of the file has more no of words then the other
  
   //if file1 has not reach its end
   while(fscanf(f1,"%s",word1)!=EOF){
        printf(" %s",word1);
       count++;
       fprintf(out," %s",word1);
  
   }
   //if file2 has not reach its end
   while(fscanf(f2,"%s",word2)!=EOF){
        printf(" %s",word2);
       count++;
       fprintf(out," %s",word2);
  
   }
   //display the count variable
   printf("\n%d words written.",count);
  
   //close the files
    fclose(f1);
    fclose(f2);
    fclose(out);
  
    return 0;
}

OUTPUT:

nter first input file name: F1.TXT er second input file name: F2.TXT nter output file n Interleaved text: Copy some and then interleave these 2 text files. without losing any words 13 words written ame: oUT. TXT

OUT.TXT:

Copy some and then interleave these 2 text files. without losing any words