c++ - C++如何将字符串转换为char数组并检查数字？

我该怎么做呢？我要它检查数字

cout<<"Enter your first number: ";
std::cin >> dblNumOne;
int i=0;
char str[]=dblNumkOne;
while (str[i])
{
    if (isalpha(str[i])) printf ("character %c is alphabetic\n",str[i]);
    else printf ("character %c is not alphabetic\n",str[i]);
    i++;
}

最佳答案

很简单，只需像这样遍历std :: string：

std::string dblNumOne;
std::cin >> dblNumOne;

for(unsigned int i = 0; i < dblNumOne.length(); i++)
{
    if (isalpha(dblNumOne[i]))
    {
        printf ("character %c is alphabetic\n", dblNumOne[i]);
    }
    else
    {
        printf ("character %c is not alphabetic\n", dblNumOne[i]);
    }
}

关于c++ - C++如何将字符串转换为char数组并检查数字？，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/18777372/