Help with file read/write plz

[cusado]

im writing a program that opens a file, reads until it arrives at a colon, then jumps over the colon and reads the number after the colon
the txt file contains

pi:3.14159
feetPerMile:5280
0FinDegreesC:-17.8
Count these words:3
Space before number: 2.0
What about comments: 6.024e23

so i want to skip the colons

my code

#define LINESIZE 160
#define INFILE "config.txt"
#include <stdio.h>
#include <string.h>

int main(int argc, char *argv[])
{
    char buf[LINESIZE];
    
    FILE *fin;
    fin = fopen(INFILE, "r");
    
    while ( fgets ( buf, LINESIZE, fin) != NULL ) 
    {
     int i;
         if (buf[i] == ':');
           fputs ( buf, stdout ); 
           sscanf(buf+i+1, "%d:");
           printf("%d");
        printf("\n");
  }
      fclose (fin);
     return 0;
    }

when i run i get an error message
basically i want it to eventually print out

pi
3.14159
feetPerMile
5280
0FinDegreesC
-17.8
Count these words
3
Space before number
2.0
What about comments
6.024e23

[ankit_the_hawk]

why dont u use getc and putc instead of fgets , the code would be so much less complicated

#define INFILE "config.txt"
#include <stdio.h>
#include <string.h>

void main()
{
char ch;

FILE *fin;
fin = fopen(INFILE, "r");

do
{
ch=getc(fin);
if(ch!=':')
{
 printf("%c",ch);
}
else
{ 
 printf("\n");
}
}while ( ch!=EOF );
getch();
fclose (fin);
}

I hope this helps u out!

[cusado]

why dont u use getc and putc instead of fgets , the code would be so much less complicated

#define INFILE "config.txt"
#include <stdio.h>
#include <string.h>

void main()
{
char ch;

FILE *fin;
fin = fopen(INFILE, "r");

do
{
ch=getc(fin);
if(ch!=':')
{
 printf("%c",ch);
}
else
{ 
 printf("\n");
}
}while ( ch!=EOF );
getch();
fclose (fin);
}

I hope this helps u out!

it helps..but the problem is with this it only prints 1 charc...

[ankit_the_hawk]

It is in loop so it prints the entire text; I dont get u, it just prints one character at a time
try the code, it works :confused:

[cusado]

hmm looks that way but errors still come up:

D:\Program Files\PellesC\Projects\assignment2\main.c(37): error #1053: Disagreement in number of macro arguments.
D:\Program Files\PellesC\Projects\assignment2\main.c(37): error #2070: Insufficient number of arguments to 'getc'.
D:\Program Files\PellesC\Projects\assignment2\main.c(41): error #2001: Syntax error: found 'fclose' - expecting 'while'.
D:\Program Files\PellesC\Projects\assignment2\main.c(41): error #2001: Syntax error: found 'fclose' - expecting '('.
D:\Program Files\PellesC\Projects\assignment2\main.c(41): error #2001: Syntax error: found ';' - expecting ')'.

[ankit_the_hawk]

hmm looks that way but errors still come up:

D:\Program Files\PellesC\Projects\assignment2\main.c(37): error #1053: Disagreement in number of macro arguments.
D:\Program Files\PellesC\Projects\assignment2\main.c(37): error #2070: Insufficient number of arguments to 'getc'.
D:\Program Files\PellesC\Projects\assignment2\main.c(41): error #2001: Syntax error: found 'fclose' - expecting 'while'.
D:\Program Files\PellesC\Projects\assignment2\main.c(41): error #2001: Syntax error: found 'fclose' - expecting '('.
D:\Program Files\PellesC\Projects\assignment2\main.c(41): error #2001: Syntax error: found ';' - expecting ')'.

Are you sure you wrote the exact code? Because I am using Dev C++ and the program runs absolutely fine. So I am not sure why these errors are cropping up :eek:

[cusado]

lol im using pellesC thats why

[cusado]

which means theres no getch()

[ankit_the_hawk]

lol im using pellesC thats why

but does it matter which compiler your using? the syntax remains the same.
Oh ! so 'getch()' is not there :), do tell if the program works without getch()

[cusado]

if i change getch() to getc(fin) it returns p-other wise the errors appear

[cusado]

nvm that doesnt work either

[ankit_the_hawk]

nvm that doesnt work either

nvm? dont really know about pellesC :rolleyes:

[Lerner]

In C++ you could use : as the terminating char to getline() to do the job in a whiff. To my knowledge fgets() is the closest you can get to getline() in C, though, and it doesn't have a terminating variable as an argument.

I would either read the file one line at a time with fgets() and then read the string one char at a time until I found :, or I would read the file one char at a time until I found :.

//pseudocode
void parseString(char[80] input, char[80] s, int & data)
{
   int i = 0;
   int j = 0;
   int len = strlen(input);
   char temp[80];

   while current char in input is not a colon
      assign current char in input to s
      
   when current char of input is colon
       terminate s with a null char
   
   ignore the colon

   read remainder of input into temp
   
   terminate temp with a null char

   convert temp from string to numerical value using sscanf() and store in data
}