Question

C语言课程设计 麻烦高手进来帮帮忙 谢谢啦！~~~要源代码

求一维数组中下标为奇数的元素之和.求二维数组中全部元素之和.求一维数组中各元素的平均值.

Answer 1

1
void main(){
int a[20],sum=0;
for (int i=0;i<20;i++){
scanf("%d",&a[i]);
if (i%2==1) sum+=a[i];
}
printf("sum=%d\n",sum);
}

2
void main(){
int a[20][20],sum=0;
for (int i=0;i<20;i++)
for (int j=0;j<20;j++){
scanf("%d",&a[i]);
sum+=a[i];
}
printf("sum=%d\n",sum);
}

3
void main(){
int a[20],sum=0;
for (int i=0;i<20;i++){
scanf("%d",&a[i]);
sum+=a[i];
}
printf("average=%f\n",(float)sum/20);
}

Answer 2

这个一定很难