100位数字相加

int _tmain(int argc, _TCHAR* argv[])
{
        char num1[100] = {'1'};
        char num2[100] = {'2'};
        char sum[101] = {0};
        for (int i=0;i<100;++i)
        {
                num1[i] = '1';
                num2[i] = '9';
        }
        int nJinWei = 0;
        int nTmpSum = 0;
        for (int i=0;i<100;++i)
        {
                nTmpSum = (num1[i] - '0') + (num2[i]-'0') + nJinWei;

                nJinWei = nTmpSum / 10;
                sum[i] = nTmpSum % 10;
        }
        sum[100] = nJinWei;
        for (int i=1;i<=101;i++)
        {
                printf("%d",sum[101-i]);
        }
        getchar();
        return 0;
}