C Primer Plus 第6版 Chapter 10 課後程式設計練習
阿新 • • 發佈:2018-12-15
ex10.1
// ex_10.1 #include <stdio.h> #define MONTHS 12 // number of months in a year #define YEARS 5 // number of years of data int main(void) { // initializing rainfall data for 2010 - 2014 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++) { // for each year, sum rainfall for each month for (month = 0, subtot = 0; month < MONTHS; month++) subtot += *(*(rain + year) + month); printf("%5d %15.1f\n", 2010 + year, subtot); total += subtot; // total for all years } printf("\nThe yearly average is %.1f inches.\n\n",total/YEARS); printf("MONTHLY AVERAGES:\n\n"); printf(" Jan Feb Mar Apr May Jun Jul Aug Sep Oct "); printf(" Nov Dec\n"); for (month = 0; month < MONTHS; month++) { // for each month, sum rainfall over years for (year = 0, subtot =0; year < YEARS; year++) subtot += *(*(rain + year) + month); printf("%4.1f ", subtot/YEARS); } printf("\n"); return 0; }
ex10.2
ex10.3
// ex_10.3 #include <stdio.h> #include <string.h> int main(void) { int arr[11] = { 10, 69, 59, 8, 6, 5, 23, 486, 5, 100, 3}; int result = max_element(arr); printf("The max element of array is %d.\n", result); return 0; } int max_element(int arr[]) { int max = arr[0]; for (int i = 0; i != '\n'; i++) { if (max < arr[i]) { max = arr[i]; } } return max; }