//运行不了??int main(){int arr[4] = {0};int i = 0;while(i{scanf("&d",&arr[i]);i++;}int max = arr[0];i = 1;while(i{if(arr[i]>max){max = arr[i];}i++;}printf("%d\n",max);return 0;}//============//运行不了??int main(){int i = 0;int n = 0;int max = 0;scanf("%d", &max); while(i{scanf("&d", &n);if (n>max)max = n;i++;}printf("%d\n", 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。