定义一个5个整型变量的数组,将其初始化为{2,4,6,8,9,},然后从键盘上输 ...答:include<stdio.h> int main(){int i,n,a[10]={2,4,6,8,9};scanf("%d",&n);for(i=0;i<5;i++)if(a[i]==n)break;if(i<5)printf("index:%d\n",i);else printf("-1\n");return 0;}
定义一个整型数组,int a[]={1,2,3,4,5}求数组元素之和并输出答:您好,这样就可以了 include <stdio.h>int main(){int a[]={1,2,3,4,5},i,sum=0;for(i=0;i<5;i++)sum+=a[i];printf("%d\n",sum);}