Question

c语言编程 请用大一知识喔

Answer 1

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

int main(void)
{
    char num[5];
    int i, j, k, count;
    int temp;

    count = 2000-20+1;
    for(i = 20; i <= 2000; ++i)
    {
        temp = i;
        j = 0;
        while(temp)
        {
            num[j] = temp%10;
            j++;
            temp/=10;
        }
        k = 0;
        j = j-1;
        while(k<j)
        {
            if(num[k]!=num[j])
            {
                count--;
                break;
            }
            k++;
            j--;
        }
    }
    printf("%d\n", count);
    return 0;
}

Answer 2

追答