程序代码：

#include <iostream>
#include <ctime>
using namespace std;
void initData(double **a);
int main()
{
    srand((unsigned)time(NULL));
    double grade[30][3];
    initData(grade);
    return 0;
}
void initData(double **a)
{
    int i,j;
    for(i = 0; i < 30 ;++i)
    for(j = 0; j < 3 ; ++j)
    a[i][j] = rand() % 61 + 40;
}