#include <stdio.h>
#include <string.h>
// 把字符串转换成数字，例如：’123‘转换成123
int toNumber(char *str, int pre, int p)
{
    int num = 0;
    
    for(int i = pre; i <= p; i++)
        num = num * 10 + (str[i] - 48);
    
    return num;
}
//把含有逗号的数字字符串转换成数字数组
int toArray(char *str, char c, int arr[])
{
    int pre = 0, p = 0;
    int len = strlen(str);
    int cnt = 0;
    for(int i = 0; i < len; i++)
    {
        if(str[i] == c || i == len - 1)
        {
            if(i == len - 1)
                p = p + 1;
            int num = toNumber(str, pre, p);
            arr[cnt++] = num;
            pre = i + 1;
        }
        else
        {
            p = i;
        }
    }
    return cnt;
}
int main(void) { 
    char str[] = "512,34,288";
    char c = ',';
    int arr[] = {0, 0, 0, 0, 0};
    int cnt = toArray(str, c, arr);
    for(int i = 0; i < cnt; i++)
        printf("%d\n", arr[i]);
    return 0;
}