Nsryjdtyk

I am a novice and for my school programming exercise I need to make integer array from specified input. Input look like this:

1000: { 250, 500, 750 } (enter)

My very basic code is capable to scan only numbers separated with whitespace.

#include <stdio.h>

#include <stdlib.h>

#define LEN 10

long int array[LEN];



    int main()

    {   

        long int i;



        for (i =0; i < LEN; i++)

            {

            scanf("%li", &array[i]);

            }



    return 0;

    }

I have a static array and I need to fill it with numbers in {} brackets. The number before ":" symbol (1000 in this case) I could scan as a single variable or as a 0th element of array. Sould I use some modified scanf? But I think the way here is some while cycle with scanf. Sometimes is array bigger than amout of given numbers so I need to end cycle with "}" symbol. Thanks for ideas.

Consider using fgets to read a line. Parse the line with sscanf. The %n specifier will report the number of characters processed by the scan. Accumulating those values will allow for iterating through the line.

#include <stdio.h>

#include <stdlib.h>



#define SIZE 4000

#define LIMIT 500



int main( void) {

    char line[SIZE] = "";

    char bracket = 0;

    long int value[LIMIT] = { 0};

    int result = 0;

    int input = 0;

    int offset = 0;

    int span = 0;



    printf ( "enter values x:{w,y,...,z}n");

    if ( fgets ( line, sizeof line, stdin)) {

        //scan for long int, optional whitespace, a colon,

        //optional whitespace, a left brace and a long int

        if ( 2 == ( result = sscanf ( line, "%ld : {%ld%n", &value[0], &value[1], &offset))) {

            input = 1;

            do {

                input++;

                if ( LIMIT <= input) {

                    break;

                }

                //scan for optional whitespace, a comma and a long int

                //the scan will fail when it gets to the right brace }

                result = sscanf ( line + offset, " ,%ld%n", &value[input], &span);

                offset += span;//accumulate processed characters

            } while ( 1 == result);

            //scan for optional space and character ie closing }

            sscanf ( line + offset, " %c", &bracket);

            if ( '}' != bracket) {

                input = 0;

                printf ( "line was not terminated with }n");

            }

        }

    }

    else {

        fprintf ( stderr, "fgets EOFn");

        return 0;

    }



    for ( int each = 0; each < input; ++each) {

        printf ( "value[%d] %ldn", each, value[each]);

    }



    return 0;

}