题解 | Hello World for U

#include <stdio.h>
#include <string.h>
using namespace std;
int main() {
   int n1,n2=3,n3,k=0;
   int i=0,j=0,n=0;
   char str;
   char index[100]={0};
   char arr[100][100]={0};
   while((str=getchar())!='\n') {
       index[j] = str;
       ++j;}

       for (i = 0; i < 100; ++i) {
           if (index[i] != 0) {
               ++n;
           }
       }
       k = n1 = n3 = (n + 2) / 3;
       n2 = (n +2)- (n1+n3);
       for (int m = 0; m < k; ++m) {
           arr[m][0] = index[m];
       }
       int l = k - 1;
       for (int m = 0; m < n2; ++m) {
           arr[k - 1][m] = index[l];
           ++l;
       }

       int num = n2 + k - 2;
       for (int m = k - 1; m >= 0; --m) {
           arr[m][n2 - 1] = index[num];
           ++num;
       }
    for(int i=1;i<n2-1;++i){
        for(int j=0;j<k-1;++j){
            arr[j][i]=' ';
        }
    }

       for (int i = 0; i < k; i++) {


           printf("%s\n", arr[i]);}


        return 0;

}