CODEWITHSUNDEEP
carrayscommand
JDeffo
JDeffo

Reputation: 73

Accepting Integer Array from Command Line - C Programming

I need to accept an array of integers from the command line, such as: ./test 2 9 -5 17

Currently I have:

int main(int argc, int *argv[])

And then loops to find the two numbers within this array that create the maximum value possible starting with argv[1]. Obviously this does not work. Do I need it to be:

int main(int argc, char *argv[])

and then parse this? I am not sure how to covert characters to integers in C.

Thanks,

Upvotes: 0

Views: 950

Answers (2)

lost_in_the_source
lost_in_the_source

Reputation: 11237

int main(int argc, char *argv[])
{
    size_t i;
    int n;

    for (i = 0; i < argc; ++i) {
        if (sscanf(argv[i], "%d", &n) == 0) {
            fprintf(stderr, "Position %d is not an int\n", i + 1);
            return 1;
        }
        printf("%d\n", n);
    }

    return 0;
}

Upvotes: 0

FredK
FredK

Reputation: 4084

Use strtol() to convert each argv[i] (for i starting at 1) to a long int.

Upvotes: 1

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