c语言求二维数组中所有元素的和答:include<stdio.h> int main(void){ int ar[3][3]= { {1,2,3},{4,5,6},{7,8,9} };int num;int i,j;int k = 0,sum=0;int (*ptr)[3];ptr = ar;num = sizeof(ar) / sizeof(ar[0]);printf("num = %d\n",num);printf("%d\n",*(*(ptr +0) + 1));for(...
已知一个二维数组a[3][4]={1,2,3,4,5,6,7,8,9,10,11,12},求出所有元素...答:public static void main(String[] args) { Integer[] num={1,2,3,4,5,6,7,8,9,10,11,12};int sum=0;for(int i=0;i<num.length;i++){ sum+=num[i];} int avg=sum/num.length;for(int i=0;i<num.length;i++){ if(num[i]>avg){ System.out.println(num[i]+" 下标...