Question

Write the program in C

The following statistics for cities of the Vege country are stored in a file: Name: a string of characters less than 15 characters long. Population: an integer value. Area: square miles of type double Write a program that: asks and gets the name of the input file from the user. Read the contents of the file into an array length 10 of structures -ask the user for the name of a city (less than 15 characters long) and store it in the proper length string. Search the array of structures for a match and if found output the name of the city and its population density to the screen. A name match should ignore the case; ex: tomato" and "ToMAto" are a match. Ask the user for an output file name Write the name of each city and its population density to the output file, on separate lines Each output record has to be similar in format to input.

Answer 1

struct City cityList[10: struct City ci; //if file in not valid if (inPointNULL) fprintf (stderr, "\nFile error, please input correct file\n") exit (1); //Read and store the file contents into the structre char buff [15]; fscanf(inPoint, "%s", buff); printf ("1 : %s\n", buff ); while (num<10) strcpy (cityList[num] . Name, buff); fscanf (inPoint, "%d", &cityList[num]. Population) fscanf (inPoint, "%1f", &cityList [num].Area); printf ("%d : %s %d %lf\n", num, cityList [num] .Name, cityList [num] . Population, cityList [num] .Area) fscanf(inPoint, numt+ "%s", buff); char buff1[15];

//crate the file pointer by opeing the file FILE *outPointi outPoint-fopen (output, "w") for (1-0; i<10;i++) fprintf (outPoint, cityList[i] .Name) double t= cityList [i]. Population/ (double) cityList[i].Area; fprintf (outPoint, "%lf\n", t); fclose (outPoint): return 0; InputFile: Note: Use a file of cities greater than 10 since we need to populate 10 structures

citylist.txt X main.cpp* Vegas 10000 12.3 NewYork 20000 16.5 London 30000 17.4 Berlin 200 2.3 Delhi 50000 20 Sydney 10000 20 Paris 30000 15.4 Mumbai 20000 23 chennai 50000 20 Bres 10000 20 Console Screen Shot: CAUsers Vis Visual Studio 20101 Enter the file name: citylist.txt Vegas Vegas 10e 12.388600 1 : NewYork 20 0 16 . 5ΘΘΘθΘ 2 : London 300θ9 17.4ee0θθ 3 Berlin 2000 2.300000 Delhi 50000 20.000000 Sydney 10ee 20.e6660e 5 : Paris 30000 15.4000ΘΟ : Mumbai 20000 23 .00ΘΘΘθ chennai 5000 20.00000e Enter the city to search: Delh:i The city Delhihas a population density of 2500.000000 Enter the output file name: Dens.txt ress any key to continue . . 6

Copyable Content:

Executable Code:

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <ctype.h>

//The city structure

struct City

{

char Name[15];

int Population;

double Area;

};

// Driver program

int main ()

{

int num=0;

//To take the input file

char input[20];

printf("Enter the file name: ");

scanf("%s", input);

//crate the file pointer by opeing the file

FILE *inPoint;

inPoint=fopen (input, "r");

//crate the array of structure

struct City cityList[10];

struct City ci;

//if file in not valid

if (inPoint == NULL)

{

fprintf(stderr, "\nFile error, please input correct file\n");

exit (1);

}

//Read and store the file contents into the structre

char buff[15];

fscanf(inPoint, "%s", buff);

printf("1 : %s\n", buff );

while(num<10)

{

strcpy(cityList[num].Name,buff);

fscanf(inPoint, "%d", &cityList[num].Population);

fscanf(inPoint, "%lf", &cityList[num].Area);

printf ("%d : %s %d %lf\n", num, cityList[num].Name, cityList[num].Population, cityList[num].Area);

fscanf(inPoint, "%s", buff);

num++;

}

char buff1[15];

//read the city from user

printf("Enter the city to search: ");

scanf("%s", buff1);

int i;

for(i=0; i<strlen(buff1); i++)

{

buff1[i]=tolower(buff1[i]);

}

char tem[15];

int j=0;

for(i=0; i<10;i++)

{

strcpy(tem,cityList[i].Name);

for(j=0; j<strlen(tem); j++)

{

tem[j]=tolower(tem[j]);

}

if(strcmp(tem, buff1)==0)

{

printf("The city %s", cityList[i].Name);

printf("has a population density of %lf\n\n", cityList[i].Population/cityList[i].Area);

}

}

char output[20];

printf("Enter the output file name: ");

scanf("%s", output);

//crate the file pointer by opeing the file

FILE *outPoint;

outPoint=fopen (output, "w");

for(i=0; i<10;i++)

{

fprintf(outPoint, cityList[i].Name);

double t= cityList[i].Population/(double)cityList[i].Area;

fprintf(outPoint, "%lf\n", t);

}

fclose(outPoint);

return 0;

}

Input File example:

Vegas 10000 12.3

NewYork 20000 16.5

London 30000 17.4

Berlin 2000 2.3

Delhi 50000 20

Sydney 10000 20

Paris 30000 15.4

Mumbai 20000 23

chennai 50000 20

Bres 10000 20