C++ 字符串转化为数组 有负数 数字之间为空格间隔

void strToint()

{

gets(str);

int k = 0;
int num = 0;
for (int i = 0; str[i] != '\0'; i++)
{
if (str[i] == '-')//遇见负号
{
i++;
while (str[i] != ' '&& str[i] != '\0')
{
num = num * 10 + str[i] - '0';
i++;
}
a[k++] = (-1)* num;
num = 0;

}
else if (str[i] == ' ')//遇见空格就计算出数
{
a[k++] = num;
num = 0;

}
else
{
num = num * 10 + str[i] - '0';
if (str[i + 1] == '\0')
{
a[k++] = num;//累计数的大小
num = 0;
}
}
}

}