这是C Primer Plus中的一道题,代码如下:
#include <stdio.h>
#define MONTHS 12
#define YEARS 2
int main(void)
{
const float rain[YEARS][MONTHS] =
{
{ 4.3,4.3,4.3,3.0,2.0,1.2,0.2,0.2,0.4,2.4,3.5,6.6 },
{ 8.5,8.2,1.2,1.6,2.4,0.0,5.2,0.9,0.3,0.9,1.4,7.3 }
};
int year, month;
float total1 = 0, total2 = 0;
const float (*rainp) [2] = rain;
printf("两年降雨总量为:\n");
for (year = 0; year < YEARS; year++)//以数组输出
for (month = 0; month < MONTHS; month++)
{
printf("%4.1f", rain[year][month]);
total1 += rain[year][month];
}
printf("\n\n%.2f\n", total1);
for (year = 0; year < YEARS; year++)//以指针输出
for (month = 0; month < MONTHS; month++)
{
printf("%4.1f", *(*(rainp + year) + month));
total2 += *(*(rainp + year) + month);
}
printf("\n\n%.2f\n", total2);
system("pause");
return 0;
}
编译运行结果如下:
其中红框部分是分别用数组和指针输出的数字,其范围为数组rain[0][0]到rain[0][11]第一行正确但是第二行出现偏差。而数组其他部分数值正常。我想请教一下这是为什么。