#73 Write a program that processes a data file of names

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Question

Write a program that processes a data file of names in which each name is on a separate line of at most 80 characters. Here are two sample names:

Hartman-Montgomery, Jane R.

Doe, J. D.

On each line, the surname is followed by a comma and space. Next comes the first name or initial, then space and the middle initial. Your program should scan the names into three arrays— surnames, first, and middle_init. If the surname is longer than 15 characters, store only the first 15. Similarly, limit the first name to ten characters. Do not store periods in the first and middle_init arrays. Write the array’s contents to a file, aligning the contents of each column:

Hartman-Montgom Jane RDoe JD

Answer

Step 1

Program:

/**********************************************************

*Program to process a data file of names on a separate *

*line and print the required in an output file *

**********************************************************/

#include

#include

#include

//define the size as 50.

#define SIZE 50

int main()




{

  //declare the variables.

  char line[80]=" ";

  int count =0;

  //declare three arrays

  char first[SIZE][11];

  char surname[SIZE][16];

  char middle_init[SIZE][11];

  //open the inout file in read mode.

  FILE *fin = fopen("input.txt", "r");

  //if file not open, print a message.

  if(fin==NULL)

  {

    printf("Unable open the input file.\n");

  }

  else

  {

    //open the output in write mode.

    FILE *fout = fopen("output.txt", "w");

    //if file not open, print a message.

    if(fout==NULL)

    {

      printf("Cannot open the output file.\n");

      fclose(fin);

    }

    else

    {

      //read the file until end of file.

      while(fgets(line, 80, fin)!=NULL)

      {

        //declare the variables

        int i=0;

        char temp[]=" ";

        char *tempStr = strtok(line, temp);

        //read the surname upto less than or

        //equal to 15 skip the commas

while((i<15)&& *(tempStr+i)!=','&& *(tempStr+i)!='\n')

        {

          surname[count][i]=*(tempStr+i);

          i++;

        }

        surname[count][i]='\0';

        tempStr = strtok(NULL, temp);

        //read the first name upto less than or

        //equal to 10 skip the commas

        i=0;

while((i<10)&&*(tempStr+i)!='.'&&*(tempStr+i)!=','&& *(tempStr+i)!='\n')

        {

          first[count][i]=*(tempStr+i);

          i++;

        }

        first[count][i]='\0';

        tempStr = strtok(NULL, temp);

        i=0;

        //read the middile name upto less than

        //or equal to 10 skip the commas

while((i<10)&&*(tempStr+i)!='.'&&*(tempStr+i)!=','&& *(tempStr+i)!='\n')

        {

               middle_init[count][i]=*(tempStr+i);

          i++;

        }

        middle_init[count][i]='\0';

        //write the data in the output file.

Step 2

fprintf(fout,"%-15s\t\t%-10s\t%-10s\n",surname[count], first[count], middle_init[count]);

        //increment the count value.

        count++;

      }

    }

    //close the output and input files.

    fclose(fout);

    fclose(fin);

  }

  return 0;

}

Step 3

Input text file: input.txt

Hartman-Montgomery, Jane R.

Doe, J. D.

Step 4

Sample output file: output.txt