#include <stdio.h>
void fun(double a[3][3])
{
double *ptr = (double *)a;
printf("input 9 data:\n");
// 输入数据到二维数组 a[3][3]
for (int i = 0; i < 9; ++i)
scanf("%lf", ptr + i);
double max = *ptr;
// 查找 a[3][3]的最大值,并输出
for (int i = 1; i < 9; ++i )
if (*(ptr+i) > max)
max = *(ptr+i);
printf("max elem value = %g\n", max);
}
int main()
{
double x[3][3];
fun(x);
return 0;
}