c语言求二维数组中所有元素的和答: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(i = 0; i < 3...
php二维数组,相同值求和,并返回新的数组答:php$old_arr = array( array(1,107,100,83,44,111), array(100,109,126,86,93,22), array(10,113,126,86,93,22), array(100,109,126,86,93,22),);$new_arr = array(0,0,0,0,0,0);foreach($old_arr as $arr){ for ($i = 0; $i < 6; $i++) { ...