int[]?arr?=?{61,?23,?4,?74,?13,?148,?20};
double?sum?=?0;
int?i?=?6;
for?(;?i?<?arr.length?&&?i-1?>=?0;?i--)?{
????if?(arr[i]?>?arr[i?-?1])?{
????????arr[i?-?1]?=?arr[i];
????}
}
System.out.println("數(shù)組中最大值為："?+?arr[i]);
System.out.println("*****************************************");
int[]?arr1?=?{61,?23,?4,?74,?13,?148,?20};
int?j?=?6;
for?(;?j?<?arr1.length?&&?j-1?>=?0;?j--)?{
????if?(arr1[j]?<?arr1[j?-?1])?{
????????arr1[j?-?1]?=?arr1[j];
????}
}
System.out.println("數(shù)組中最小值為："?+?arr1[j]);
System.out.println("*****************************************");
int[]?arr2?=?{61,?23,?4,?74,?13,?148,?20};
for(int?k=0;k<arr2.length;k++){
????sum=sum+arr2[k];

}
System.out.println("數(shù)組中平均值為："?+?sum/arr.length);