#include

#include

#include

#define MAXR 1000

#define MAXC 30

#define MAXR 1000

#define MAXC 30

// Function to read file contents and stores it in respective arrays

// Returns number of records

int readFile(char citycode[MAXC][MAXR],char cityName[MAXR][MAXC],int order[MAXR], int population[MAXR], float latitude[MAXR], float longitude[MAXR])

{

// File pointer declared

FILE *fp;

// Record counter

int len = 0;

// To store highest player score name

// Opens the file for reading

fp = fopen("worldcities.txt", "r");

// Checks if the file cannot be opened display error message and stop

if(!fp)

{

printf("ERROR: The file cannot be opened");

exit(0);

}// End of if condition

// Loops till end of the file

while(!feof(fp))

{

// Reads data and stores in len index position of respective arrays

fscanf(fp, "%[^\\,.],%[^\\,],%d,%d,%f,%f ",&citycode[len],&cityName[len],&order[len], &population[len], &latitude[len], &longitude[len]);

// Increase the record counter by one

len++;

}// End of while loop

// Close the file

fclose(fp);

// Returns number of records read

return len;

}// End of function

void sortCityName(char cityName[MAXR][MAXC], int population[MAXR], float latitude[MAXR],

double longitude[MAXR], int len)

{

// Displays heading

printf(" **************** Sort by City Name **************** ");

// File pointer declared

FILE * fp;

// Opens the file for reading

fp = fopen ("cities_alpha.txt","w");

// Loops variable

int r, c;

// Temporary variables to swap

char tempC[MAXC];

int tempP;

double tempL;

// Loops till number of records

for(r = 0; r < len; r++)

{

// Loops till number of records minus outer loop variable value minus one

// Because after each iteration of inner loop one record is sorted

for(c = 0; c < len - r - 1; c++)

{

// Checks if current index position city name is greater than the next

// index position record city name

// Then swap

if(strcmp(cityName[c], cityName[c + 1]) > 0)

{

// Swaps city name

strcpy(tempC, cityName[c]);

strcpy(cityName[c], cityName[c + 1]);

strcpy(cityName[c + 1], tempC);

// Swaps city population

tempP = population[c];

population[c] = population[c + 1];

population[c + 1] = tempP;

// Swaps city latitude

tempL = latitude[c];

latitude[c] = latitude[c + 1];

latitude[c + 1] = tempL;

// Swaps city longitude

tempL = longitude[c];

longitude[c] = longitude[c + 1];

longitude[c + 1] = tempL;

}// End of if condition

}// End of inner for loop

}// End of outer for loop

// Loops till number of records

for(c = 0; c < len; c++)

{

// Writes each record data to file

fprintf (fp,"%s, %d, %d, %d", cityName[c], population[c], latitude[c], longitude[c]);

// Displays each record

printf("%s, %d, %d, %d ", cityName[c], population[c], latitude[c], longitude[c]);

}// End of for loop

// Close the file

fclose(fp);

}// End of function

void sortCityPopulation(char cityName[MAXR][MAXC], int population[MAXR], float latitude[MAXR],

float longitude[MAXR], int len)

{

// Displays heading

printf(" **************** Sort by City Population **************** ");

// File pointer declared

FILE * fp;

// Opens the file for reading

fp = fopen ("cities_population.txt","w");

// Loops variable

int r, c;

// Temporary variables to swap

char tempC[MAXC];

int tempP;

float tempL;

// Loops till number of records

for(r = 0; r < len; r++)

{

// Loops till number of records minus outer loop variable value minus one

// Because after each iteration of inner loop one record is sorted

for(c = 0; c < len - r - 1; c++)

{

// Checks if current index position population is greater than the next

// index position record population

// Then swap

if(population[c] > population[c + 1])

{

// Swaps city name

strcpy(tempC, cityName[c]);

strcpy(cityName[c], cityName[c + 1]);

strcpy(cityName[c + 1], tempC);

// Swaps city population

tempP = population[c];

population[c] = population[c + 1];

population[c + 1] = tempP;

// Swaps city latitude

tempL = latitude[c];

latitude[c] = latitude[c + 1];

latitude[c + 1] = tempL;

// Swaps city longitude

tempL = longitude[c];

longitude[c] = longitude[c + 1];

longitude[c + 1] = tempL;

}// End of if condition

}// End of inner for loop

}// End of outer for loop

// Loops till number of records

for(c = 0; c < len; c++)

{

// Writes each record data to file

fprintf (fp, "%s, %d, %f, %f", cityName[c], population[c], latitude[c], longitude[c]);

// Displays each record

printf("%s, %d, %f, %f ", cityName[c], population[c], latitude[c], longitude[c]);

}// End of for loop

// Close the file

fclose(fp);

}// End of function

void sortCityLatitude(char cityName[MAXR][MAXC], int population[MAXR], double latitude[MAXR],

double longitude[MAXR], int len)

{

// Displays heading

printf("**************** Sort by City Latitude **************** ");

// File pointer declared

FILE * fp;

// Opens the file for writing

fp = fopen ("cities_latitude.txt","w");

// Loops variable

int r, c;

// Temporary variables to swap

char tempC[MAXC];

int tempP;

float tempL;

// Loops till number of records

for(r = 0; r < len; r++)

{

// Loops till number of records minus outer loop variable value minus one

// Because after each iteration of inner loop one record is sorted

for(c = 0; c < len - r - 1; c++)

{

// Checks if current index position latitude is greater than the

// next index position record latitude

// Then swap

if(latitude[c] > latitude[c + 1])

{

// Swaps city name

strcpy(tempC, cityName[c]);

strcpy(cityName[c], cityName[c + 1]);

strcpy(cityName[c + 1], tempC);

// Swaps city population

tempP = population[c];

population[c] = population[c + 1];

population[c + 1] = tempP;

// Swaps city latitude

tempL = latitude[c];

latitude[c] = latitude[c + 1];

latitude[c + 1] = tempL;

// Swaps city longitude

tempL = longitude[c];

longitude[c] = longitude[c + 1];

longitude[c + 1] = tempL;

}// End of if condition

}// End of inner for loop

}// End of outer for loop

// Loops till number of records

for(c = 0; c < len; c++)

{

// Writes each record data to file

fprintf (fp,"%s, %d, %f, %f ", cityName[c], population[c], latitude[c], longitude[c]);

// Displays each record

printf("%s, %d, %f, %f ", cityName[c], population[c], latitude[c], longitude[c]);

}// End of for loop

// Close the file

fclose(fp);

}// End of function

// main function definition

int main()

{

// Character matrix to store city name

char cityName[MAXR][MAXC];

// Integer array to store population

int population[MAXR];

// Float array to store latitude

double latitude[MAXR];

// Float array to store longitude

double longitude[MAXR];

// Call the function to read file contents and store it in respective array

char citycode[MAXR][MAXC];

// Stores the return value as number of records

int order[MAXC];

int len = readFile(citycode,cityName,order, population, latitude, longitude);

// Calls the function to sort the records based on city name

sortCityName(cityName, population, latitude, longitude, len);

// Calls the function to sort the records based on population

sortCityPopulation(cityName, population, latitude, longitude, len);

// Calls the function to sort the records based on latitude

sortCityLatitude(cityName, population, latitude, longitude, len);

}// End of main function

Please help me to update this c program using 1D array

int readFile(char citycode[MAXC][MAXR],char cityName[MAXR][MAXC],int order[MAXR], int population[MAXR], float latitude[MAXR], float longitude[MAXR])

Just my main aim is i to read world_cities.txt

ad,Andorra La Vella,07,20430,42.5,1.5166667 ad,Canillo,02,3292,42.5666667,1.6 ad,Encamp,03,11224,42.5333333,1.5833333 ad,La Massana,04,7211,42.55,1.5166667 ad,Les Escaldes,08,15854,42.5,1.5333333 ad,Ordino,05,2553,42.55,1.5333333

.........

The output should be like below

Sort by City Name A,1145,63.966667,10.2 A,1145,63.966667,10.216667 A Coruna,236010,43.366667,-8.383333 A Dos Cunhados,6594,39.15,-9.3 Aabenraa,16344,55.033333,9.433333 Aabybro,4849,57.15,9.75 Aachen,251104,50.770833,6.105278 Aadorf,7100,47.483333,8.9 Aakirkeby,2195,55.066667,14.933333 Aakre,295,58.1013889,26.1944444 ... Zychlin,8844,52.25,19.616667 Zykovo,1059,54.0666667,45.1 Zykovo,5365,55.9519444,93.1461111 Zyrardow,41179,52.066667,20.433333 Zyryanka,3627,65.75,150.85 Zyryanovsk,44939,49.738611,84.271944 Zyryanovskiy,896,57.7333333,61.7 Zyryanskoye,6285,56.8333333,86.6222222 Zyukayka,4556,58.2025,54.7002778 Zyuzelskiy,1311,56.4852778,60.1316667

Sort by City Population

Tokyo,31480498,35.685,139.7513889 Shanghai,14608512,31.005,121.4086111 Bombay,12692717,18.975,72.825833 Karachi,11627378,24.866667,67.05 New Delhi,10928270,28.6,77.2 Delhi,10928270,28.666667,77.216667 Manila,10443877,14.604167,120.982222 Moscow,10381288,55.7522222,37.6155556 Seoul,10323448,37.5663889,126.9997222 Sao Paulo,10021437,-23.533333,-46.616667 ... Girsterklaus,12,49.7777778,6.4994444 Vstrechnyy,12,67.95,165.6 Qallimiut,12,60.7,-45.3333333 Skaelingur,11,62.1,-7.0 Ivittuut,11,61.2,-48.1666667 Crendal,10,50.0577778,5.8980556 El Porvenir,10,9.5652778,-78.9533333 Schleif,8,49.9905556,5.8575 Aliskerovo,7,67.7666667,167.5833333 Neriunaq,7,64.4666667,-50.3166667 Tasiusaq,7,73.3666667,-56.05 Timerliit,7,65.8333333,-53.25

Sort by City Latitude

Ushuaia,58045,-54.8,-68.3 Punta Arenas,117432,-53.15,-70.9166667 Rio Gallegos,93234,-51.6333333,-69.2166667 Port-Aux-Francais,45,-49.35,70.2166667 Bluff,1938,-46.6,168.333333 Owaka,395,-46.45,169.666667 Invercargill,47287,-46.4,168.35 Woodlands,285,-46.366667,168.55 Riverton,1651,-46.35,168.016667 Wyndham,586,-46.333333,168.85 Wallacetown,638,-46.333333,168.266667 ... Kullorsuaq,408,74.5833333,-57.2 Savissivik,82,76.0233333,-65.0813889 Moriusaq,21,76.7561111,-69.8863889 Narsaq,1709,77.3025,-68.8425 Qaanaaq,616,77.4894444,-69.3322222 Qeqertat,18,77.5097222,-66.6477778 Siorapaluk,75,77.7952778,-70.7558333 Barentsburg,576,78.0666667,14.2333333 Longyearbyen,1232,78.2166667,15.6333333 Ny-Alesund,40,78.9333333,11.95

Just i want to manplate this but i prefer if the program is 1D array means that i don't need to assign MAXR and MAXC