紧急请教一个c语言怎么写

Question

一个变量包含一组数据，求从这个变量中抽出两个数相加的c语言程序怎么写

Answer 1

 int arr[] = {1,2,3,4,5,6,7,8,9,10};
int a = rand() % 10;
int b = rand() % 10;
printf("%d+%d=%d", arr[a], arr[b], arr[a] + arr[b]);