public class HelloWorld {
    public static void main(String[] args) {
        
        int[] a = {61, 23, 4, 74, 13, 148, 20};
        int max = a[0];
        int min = a[0];
        int sun = 0;
        int avg = 0;
        
        for(int i = 0; i < a.length; i++) {
            
            while(a[i] > max) {
                max = a[i];
            }
            
            while(a[i] < min) {
                min = a[i];
            }
            
            sun = sun + a[i];
            
           avg = sun / (i + 1);
        }
        
        System.out.println("数组中的最大值：" + max);
        System.out.println("数组中的最小值：" + min);
        System.out.println("数组中的平均值：" + avg);
        
    }
}