Question

I got the following string:

"312 ,22 ,+12 , -12 , 5331"

it is possible to have more than 1 space between numbers.

I need to convert it to an array like that:

int arr[] = {312,22,-12,12,5331};

Is there a pretty and elegant way to do this with C89?

Answer 1

Use strtok + atoi:

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

int main(int argc, char const *argv[])
{
    char numbers_str[] = "312 ,22 ,+12 ,-12 ,5331", *currnum;
    int numbers[5], i = 0;

    while ((currnum = strtok(i ? NULL : numbers_str, " ,")) != NULL)
        numbers[i++] = atoi(currnum);

    printf("%d\n", numbers[3]);
    return 0;
}