Question

1. Create Lab project
2. Add the following codes to your main method. Compile and run the program with some arguments and observe the output.

      printf("You have entered %d arguments.\n", argc);

      for (int i = 0; i < argc; ++i)

        printf( "argument %d: %s\n",i+1,argv[i]);

3. Create a function called simpleFileWrite() and add the following feature: Open a write only file called “myfile.txt” and write characters into it. The set of characters are read form the keyboard until cntrl-z is entered. (use putc() and getc() function; in your c code use EOF to compare with cntrl-z).
4. Compile, build and run the program. Now print the file contents on the console using the linux command “cat myfile.txt” and observe the contents.
5. Create a function called simpleFileRead() and add the following feature: Open the file “myfile.txt” as a read only file from within your program and read characters from it and print it on the console using the printf command.
   1. Also count the number of characters in the file
   2. Observe the output to compare whether it matches with the entries that you made from the keyboard earlier.
6. Create a function called stringHandler() and add the following feature: Write set of strings each of length 40 into a file “stringc.txt”. Close the file and then reopen to read. Now display the contents of the file (use fputs() and fgets() function).
7. Create a function called mixedDataHandler() and the add the following feature: Write name, age and height of a person into a data file “person.txt”. Close the file and reopen it to read from it (use fprintf() and fscanf() function).
8. Create a C file called myCopy.c, which will process command line arguments. The first argument will be the name of the program itself, the second argument will be the source file to copy from, and the 3^rd argument will be the destination file to copy to. If the user doesn’t provide argument 2 then show error message that “Source file name needed”. If the user does not provide the 3^rd argument then use “default.txt” as the name of the output file.

please help me, this is c programming. thank you in advance.

Answer 1

(a).Program

#include <stdio.h>
#include <stdlib.h>
#include<string.h>
void simpleFileWrite();
void simpleFileRead();
int countCharcter();

int main()
{
   int count;
   simpleFileWrite();
simpleFileRead();
   count=countCharacter();
//   printf("Number ofcharacter in file is %d\n",count);
  
   return 0;
}

void simpleFileWrite()
{
   FILE *fp;
   char ch;

   //Create the file for write operation
   fp=fopen("myfile.txt","w");
   if(fp==NULL)
   {
       printf("Error on writing\n");
       exit(0);
   }
   printf("Enter line of text until Ctrl+z\n");
   while((ch=getchar())!=EOF)
   {
   putc(ch,fp);
   }

   fclose(fp);
   printf("File created..\n");

}

void simpleFileRead()
{
   FILE *fp;
   char ch;
   fp=fopen("myfile.txt","r");
   if(fp==NULL)
   {
       printf("Error on writing\n");
       exit(0);
   }
   printf("\n");
   while(!feof(fp))
   {
       //takes the characters in the character array
       ch=getc(fp);
       //and print the characters
       printf("%c",ch);
   }
   printf("\n");

   fclose(fp);
}
int countCharacter()
{
   FILE *fp;
   int count=0;
   fp=fopen("myfile.txt","r");
   if(fp==NULL)
   {
       printf("Error on writing\n");
       exit(0);
   }

   while(!feof(fp))
   {

       getc(fp);
       count++;

   }
   printf("\n");

   fclose(fp);
   return (count-1) ;
}

(b) Program

#include <stdio.h>
#include <stdlib.h>
#include<string.h>
void stringHandle();
void mixedDataHandler();
int main()
{

   stringHandle();
   mixedDataHandler();
   return 0;
}

void stringHandle()
{
   FILE *fp;
   char str[40];
   int n,i;

   fp=fopen("string.txt","w");
   if(fp==NULL)
   {
       printf("Error on writing\n");
       exit(0);
   }
   printf("Enter number of strings towrite\n");
   scanf("%d",&n);
   getchar();
   printf("Enter %d strings\n",n);
   for(i=0;i<n;i++)
   {
   gets(str);

   fputs(str,fp);
   fputs("\n",fp);
   }

   fclose(fp);
   printf("File created..\n");
   fp=fopen("string.txt","r");
   if(fp==NULL)
   {
       printf("Error on writing\n");
       exit(0);
   }

   printf("String in the files are....\n");
   while(!feof(fp))
   {
   fgets(str,40,fp);

       puts(str);

   }

   fclose(fp);

}
void mixedDataHandler()
{
   FILE *fp;
   char name[40];
   int n,i,age;
   float height;

   fp=fopen("person.txt","w");
   if(fp==NULL)
   {
       printf("Error on writing\n");
       exit(0);
   }
   printf("Enter number of records\n");
   scanf("%d",&n);
   getchar();
   printf("Enter %d records\n",n);
   for(i=0;i<n;i++)
   {
   printf("Name Age Height?\n");
   scanf("%s%d%f",name,&age,&height);
   fprintf(fp,"%s %d %f",name,age,height);

   }

   fclose(fp);
   printf("File created..\n");
   fp=fopen("person.txt","r");
   if(fp==NULL)
   {
       printf("Error on writing\n");
       exit(0);
   }

   printf("String in the files are....\n");
   while(!feof(fp))
   {
   fscanf(fp,"%s%d%f",name,&age,&height);
   printf("%s %d %f\n" ,name,age,height);
   }

   fclose(fp);

}