Thread: file processing help!!!

For some reason this segment of code does not do what it is supposed to.

Code:

 float num;
 float balance;
char filename[25];
int reg;
             
puts("enter registration number");
scanf(" %d",&reg)
               
               sprintf(filename,"%dbal.txt",reg);
               file = fopen(filename,"r");
               
               fscanf(file,"%f",&balance);
               printf("The current balance for the client is %f\n",balance);
               fclose(file);
               
               puts("enter how much you would like to add to the balance");
               scanf("%f",&num);
               
               file = fopen(filename,"w");
               balance += num;
               fprintf(file,"%f",balance);
               fclose(file);
               
               balance = 0;

it does everything apart from writing balance to the file

Looks like you're trying to open a file for writing, when it's already open for reading. Since you don't check it for errors (the opening for writing), you don't know WTF.

Originally Posted by Adak

Looks like you're trying to open a file for writing, when it's already open for reading. Since you don't check it for errors (the opening for writing), you don't know WTF.

i closed the file after i opened it for reading. look again.

for some reason it is not opening the second time

plz help

i got it to work