Using sscanf

This is a discussion on Using sscanf within the C Programming forums, part of the General Programming Boards category; I am trying to use sscanf to print out only the numbers in a string of characters. Here is my ...

  1. #1
    Registered User
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    Apr 2003
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    11

    Using sscanf

    I am trying to use sscanf to print out only the numbers in a string of characters. Here is my code so far, but I get a segmentation fault when i run it.

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

    int main() {
    char storage[100];
    int n=0, numbers;
    while( storage[n] != EOF ) {
    gets(storage);
    sscanf(storage[n], "%lf", &numbers);
    printf("%d\n", numbers);
    n++;
    }
    }

    I cant seem to find the error in this code, please help me!

  2. #2
    Registered User Codeplug's Avatar
    Join Date
    Mar 2003
    Posts
    4,669
    The first parameter to sscanf() takes a c-string, not a char - it also expects a pointer to store the results. You are also mixing integers and floats with %d and %lf (and using EOF incorrectly).
    Code:
        char test[] = "1234";
        int n;
        sscanf(test,"%d",&n);
        printf ("%d\n",n);
    What are you trying to do? Maybe we can point you to a tutorial. Otherwise, study your C book.

    gg

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