求助，我运行的时候是可以的

#include <stdio.h>
int main()
{
	int num;
	int class_age[4]={0};
	int Age_arr[200];
	scanf("%d",&num);
	printf("%d\n", num);
	for (int i =0; i<num;i++)
	{
		scanf("%d",&Age_arr[i]);
		if (Age_arr[i]>=0 && Age_arr[i]<=18)
			class_age[0]++;
		else if (Age_arr[i]>=19 && Age_arr[i]<=35)
			class_age[1]++;
		else if (Age_arr[i]>=36 && Age_arr[i]<=60)
        class_age[2]++;
		else 
			class_age[3]++;
	}
	printf("%.2f%%\n",100*class_age[0]/(float)num);
	printf("%.2f%%\n",100*class_age[1]/(float)num);
	printf("%.2f%%\n",100*class_age[2]/(float)num);
	printf("%.2f%%",100*class_age[3]/(float)num);
	return 0;
 }  ```