C Primer Plus 第10章 数组和指针 编程练习答案
1、修改程序清单10.7中的程序rain，使它不使用数组下标，而是使用指针进行计算（程序中仍然需要声明并初始化数组）。 #include <stdio.h> #define MONTHS 12 #define YEARS 5 int main (void) { //把数组初始化为2000年到2004年的降水量数据 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}, {9.1,8.5,6.7,4.3,2.1,0.8,0.2,0.2,1.1,2.3,6.1,8.4}, {7.2,9.9,8.4,3.3,1.2,0.8,0.4,0.0,0.6,1.7,4.3,6.2}, {7.6,5.6,3.8,2.8,3.8,0.2,0.0,0.0,0.0,1.3,2.6,5.2} }; int year,month; float subtot,total; printf(" YEAR RAINFALL (inches) \n"); for (year = 0,total = 0;year<YEARS;year++) { //对于每一年各月的总降水量 for(month=0