task5

`// 计算10亿秒约等于多少年，并打印输出

include <stdio.h>

include <stdlib.h>

int main()
{
int year;
year=10000000000/31536000;

// 补足代码
// ×××
printf("10亿秒约等于%d年\n", year);
system("pause");
return 0;

}`