How to check if a file exist , if it does read its content to another file.
Hey, I have this assignment for next week that requires me to write a program in c that prompts a user for a filename, if the file exist then tell the user that it exist and read the information in that file to another file called farmreport.dat, else if it does not exist create it from scratch and prompt the user for information and that information is to be sent to farmreport.dat
The name of the file that the user will enter is cropdata.dat, in this file there is the person's first name and last name on the first line and the quantity and prices of the foods they grew. Eg.
John Brown
100 2.30 300 2.00 450 1.30
Can you help me out.
So far I have written code to create the file from scratch but the information is not being saved in the file and the file is not ending. To save the info I have to enter Ctrl + Z . I cant figure out the code for if the file exist, tell the user it does and read the information into farmreport.dat.
Here is the code
Code:
#include <stdio.h>
#include <string.h>
int main (void)
{
char filename[90];
int num;
int amount1, amount2, amount3, amount4, amount5, amount6, amount7, amount8, amount9, amount10 =0;
float price1 , price2, price3, price4, price5, price6, price7, price8, price9, price10 = 0.0;
char fname[20];
char lname[20];
int count=1;
float revenue1, revenue2, revenue3, revenue4, revenue5, revenue6, revenue7, revenue8 , revenue9, revenue10 , total_revenue = 0.0;
int maxpumpkins, maxonions, maxsweetpotatoes, maxyams, maxlettuce, maxgreenpeppers, maxtomatoes, maxcucumbers, maxbananas, maxgarlic =0;
int totalpumpkins=0;
int totalonions =0;
int totalsweetpotatoes =0;
int totalyams=0;
int totallettuce=0;
int totalgreenpeppers=0;
int totaltomatoes=0;
int totalcucumbers=0;
int totalbananas=0;
int totalgarlic = 0;
int importpumpkins, importonions, importsweetpotatoes, importyams, importlettuce, importgreenpeppers, importtomatoes, importcucumbers, importbananas, importgarlic= 0;
int surpluspumpkins, surplusonions, surplussweetpotatoes, surplusyams, surpluslettuce, surplusgreenpeppers, surplustomatoes, surpluscucumbers, surplusbananas, surplusgarlic=0;
char answer;
char response;
FILE *fp1;
printf(" Enter filename \n");
scanf("%s" , filename);
if ( ( fp1 = fopen (filename, "w")) == NULL)
{
printf(" File could not be opened\n");
} // end if
else {
printf(" Please enter farmer's first and last name \n ");
scanf("%s%s", fname, lname);
printf(" Please enter the amount of pumpkins \n ");
scanf("%d", &amount1);
printf("Now kindly state the price of pumpkins per pound\n ");
scanf("%f", &price1);
//fflush(stdin);
printf(" Please enter the amount of onions \n ");
scanf("%d", &amount2);
printf("Now kindly state the price of onions per pound\n ");
scanf("%f", &price2);
printf(" Please enter the amount of sweet potatoes \n ");
scanf("%d", &amount3);
printf("Now kindly state the price of sweet potatoes per pound \n ");
scanf("%f", &price3);
printf(" Please enter the amount of yams \n ");
scanf("%d", &amount4);
printf("Now kindly state the price of yams per pound\n ");
scanf("%f", &price4);
printf(" Please enter the amount of lettuce \n ");
scanf("%d", &amount5);
printf("Now kindly state the price of lettuce per pound\n ");
scanf("%f", &price5);
printf(" Please enter the amount of greenpeppers \n ");
scanf("%d", &amount6);
printf("Now kindly state the price of greenpeppers per pound\n ");
scanf("%f", &price6);
printf(" Please enter the amount of tomatoes \n ");
scanf("%d", &amount7);
printf("Now kindly state the price of tomatoes per pound\n ");
scanf("%f", &price7);
printf(" Please enter the amount of cucumbers \n ");
scanf("%d", &amount8);
printf("Now kindly state the price of cucumbers per pound\n ");
scanf("%f", &price8);
printf(" Please enter the amount of bananas \n ");
scanf("%d", &amount9);
printf("Now kindly state the price of bananas per pound\n ");
scanf("%f", &price9);
printf(" Please enter the amount of garlic \n ");
scanf("%d", &amount10);
printf("Now kindly state the price of garlic per pound\n ");
scanf("%f", &price10);
while (!feof (fp1)) {
fprintf(fp1, "%s %s \n", fname, lname);
scanf("%s%s", fname , lname);
fprintf( fp1 , "%d %f \n" , amount1 , price1);
// scanf("%d%f", &amount1, &price1);
fprintf( fp1 , "%d %f \n" , amount2 , price2);
// scanf("%d%f", &amount2, &price2);
fprintf( fp1 , "%d %f \n" , amount3 , price3);
scanf("%d%f", &amount3, &price3);
fprintf( fp1 , "%d %f \n" , amount4 , price4);
scanf("%d%f", &amount4, &price4);
fprintf( fp1 , "%d %f \n" , amount5 , price5);
scanf("%d%f", &amount5, &price5);
fprintf( fp1 , "%d %f \n" , amount6 , price6);
scanf("%d%f", &amount6, &price6);
fprintf( fp1 , "%d %f \n" , amount7 , price7);
scanf("%d%f", &amount7, &price7);
fprintf( fp1 , "%d %f \n" , amount8 , price8);
scanf("%d%f", &amount8, &price8);
fprintf( fp1 , "%d %f \n" , amount9 , price9);
scanf("%d%f", &amount9, &price9);
fprintf( fp1 , "%d %f \n" , amount10 , price10);
scanf("%d%f", &amount10, &price10);
} // endwhile
fclose(fp1);
printf(" \n Written Successfully in the file.\n");
}
return 0;
}
