//运行不了??int main(){int arr[4] = {0};int i = 0;while(i<4){scanf(&quot;&amp;d&quot;,&amp;arr[i]);i++;}int max = arr[0];i = 1;while(i<4){if(arr[i]>max){max = arr[i];}i++;}printf(&quot;%d\n&quot;,max);return 0;}//============//运行不了??int main(){int i = 0;int n = 0;int max = 0;scanf(&quot;%d&quot;, &amp;max); while(i<4){scanf(&quot;&amp;d&quot;, &amp;n);if (n>max)max = n;i++;}printf(&quot;%d\n&quot;, max);return 0;} 请问视频里作业的代码,无法输入4个数,也无法比较。