Format specifier for sscanf() in C Post: 303040775

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Top Forums Programming Format specifier for sscanf() in C Post 303040775 by yifangt on Wednesday 6th of November 2019 01:45:08 PM

11-06-2019

Registered User

last variable gets printed twice

Thanks!
Change the char array size ID[12], str1[12] resolved the ID bug!

Last bug(hopefully!): the last variable is printed twice, that I really could not understand.

Code:

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

// pratice with fgets() + sscanf() to read in multiple lines into struct
typedef struct {
    char ID[12];
   /*omit other members for this post */
    char Indel_SNPMNPRatio[8];
} RECORD;

int main (int argc, char *argv[])
{
    char line[512];      //for row read from file
    char name[32];      //1st part (key part) parsed from each line[]
    char str1[12];       //2nd part (value part) parsed from each line[]

    FILE* fPtr = fopen(argv[1], "r");
    RECORD record[16];            //test file may have 288 ~ 306 rows including blank lines
    static int i = -1;               //initialize counter

    while (fgets(line, sizeof(line), fPtr) != NULL) {
        str1[0]='0';
        if ( line[0] == '\n' ) continue;        //skip "blank" lines with e.g. empty or invisible spaces(to be improved!).

        sscanf(line, "%[^:] : %s", name, str1);   
        if (strstr(name, "Sample Name") != NULL) {
            i++;
            strcpy(record[i].ID, str1);
            printf("\n");
        }
        printf("%s ", str1);
    }

    puts("\nEND");      //For debug.
    fclose(fPtr);
    return 0;
}

./prog vcfstats.txt

Code:

sample1 91 1 5 2 0 1 44 1.74 2.96 2.79 - 4.00 - - 2.50 0.08 0.08 
sample2 73 2 2 3 0 1 63 1.87 2.59 2.50 1.00 - - - 0.67 0.07 0.07 
...... 
sample15 87 1 4 2 0 1 42 1.74 2.96 2.79 - 2.00 - - 1.25 0.08 0.08 
sample16 83 1 2 3 0 4 65 1.87 2.59 2.50 1.00 - - - 0.67 0.07 0.07 
END

I want to ensure all the details of the bugs.
How come the last variable gets printed twice?
Thanks again.

Last edited by yifangt; 11-06-2019 at 04:30 PM..

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LEARN ABOUT OPENDARWIN

set_color

set_color(1)							       fish							      set_color(1)

NAME

       set_color - set_color - set the terminal color

set_color - set the terminal color
   Synopsis
       set_color [-v --version] [-h --help] [-b --background COLOR] [COLOR]

   Description
       Change the foreground and/or background color of the terminal. COLOR is one of black, red, green, brown, yellow, blue, magenta, purple,
       cyan, white and normal.

       o -b, --background Set the background color

       o -c, --print-colors Prints a list of all valid color names

       o -h, --help Display help message and exit

       o -o, --bold Set bold or extra bright mode

       o -u, --underline Set underlined mode

       o -v, --version Display version and exit

       Calling set_color normal will set the terminal color to whatever is the default color of the terminal.

       Some terminals use the --bold escape sequence to switch to a brighter color set. On such terminals, set_color white will result in a grey
       font color, while set_color --bold white will result in a white font color.

       Not all terminal emulators support all these features. This is not a bug in set_color but a missing feature in the terminal emulator.

       set_color uses the terminfo database to look up how to change terminal colors on whatever terminal is in use. Some systems have old and
       incomplete terminfo databases, and may lack color information for terminals that support it. Download and install the latest version of
       ncurses and recompile fish against it in order to fix this issue.

Version 1.23.1							  Sun Jan 8 2012						      set_color(1)

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