给定一个数组求奇数和偶数之和答:include<stdio.h> int main(){ int i,n=10,a[10]={1,2,3,4,5,6,7,8,9,10},s1=0,s2=0;for(i=0; i<n; i++)if(a[i]%2)s1+=a[i];else s2+=a[i];printf("奇数之和=%d\n偶数之和=%d\n",s1,s2);return 0;} ...
已知一维数组a[9]={1,2,3,4,5,6,7,8,9},求该数组中下标为奇数元素之和...答:下标为奇数元素,即下标是 i=1,3,5,7, 的元素 a[i] 之和。用循环语句,步长为2:for (i=1;i<9;i=i+2) 。。。求和 用: sum=sum+a[i];累加器 初值给0。程序如下:include<stdio.h> int main(){ int a[9]={1,2,3,4,5,6,7,8,9};int i,sum;sum=0;for (i=1;i<...
定义一个整形数组,求数组中的元素之和及平均值答:include <stdio.h> define N 10 int main( ){ int a[N] = {10,20,30,40,50,60,70,80,90,100};int i = 0,sum = 0;for(i = 0;i < N;i++){ sum = sum + a[i];} printf("元素之和为:%d,平均值为:%f\n",sum,(float)sum/N);} ...
javascript的问题,如何用for循环求数组的和??答://for循环,for in方法既可以遍历数组又可以遍历对象的可遍历属性var obj=[{a:1},{a:1},{a:1,b:[{c:1},{c:2},{c:3}]}];var obj2=[{a:1},{a:1},{a:1},{b:[{c:1},{c:2},{c:3}]}];var sum=0;var sumArr = function(arr){ for(var i in arr){ if(...