03/27 隨堂練習及作業

注意:

指標變數基本練習:傳位址

#include <stdio.h> void square(int *num1, int *num2, int *num3); void main() { int a, b, c; a = 20; b = 30; c = 50; printf("a=%d b=%d c=%d\n", a, b, c); square(&a, &b, &c); printf("a=%d b=%d c=%d\n", a, b, c); } void square(int *num1, int *num2, int *num3) { *num1 = *num1 * *num1; *num2 = *num2 * *num2; *num3 = *num3 * *num3; }

指標變數基本練習:傳值

#include <stdio.h> void square(int num1, int num2, int num3); void main() { int a, b, c; a = 20; b = 30; c = 50; printf("a=%d b=%d c=%d\n", a, b, c); square(a, b, c); printf("a=%d b=%d c=%d\n", a, b, c); } void square(int num1, int num2, int num3) { printf("num1=%d num2=%d num3=%d\n", num1, num2, num3); num1 = num1 * num1; num2 = num2 * num2; num3 = num3 * num3; printf("num1=%d num2=%d num3=%d\n", num1, num2, num3); }

字元陣列資料交換

#include <stdio.h> #include <string.h> void swap(char *x, char *y); void main() { char name1[] = "hello"; char name2[] = "world"; unsigned int i; printf("name1=%s\nname2=%s\n", name1, name2); for (i=0; i<strlen(name1); i++) swap(&name1[i], &name2[i]); printf("name1=%s\nname2=%s\n", name1, name2); } void swap(char *x, char *y) { char tmp; tmp = *x; *x = *y; *y = tmp; }

字元陣列資料交換的第二種方法

#include <stdio.h> #include <string.h> void swap(char *x, char *y); void main() { char name1[] = "hello"; char name2[] = "world"; printf("name1=%s\nname2=%s\n", name1, name2); swap(name1, name2); printf("name1=%s\nname2=%s\n", name1, name2); } void swap(char x[], char *y) { char buf[80]; int i, len; len = strlen(x); for (i=0; i<len; i++) buf[i] = x[i]; for (i=0; i<len; i++) x[i] = y[i]; for (i=0; i<len; i++) y[i] = buf[i]; }

撲克牌發牌程式

#include <stdio.h> #include <stdlib.h> #include <time.h> void shuffle(int deck[4][13]); void deal(int deck[4][13], char suiteName[][9], char faceName[][6]); void main() { char suiteName[4][9] = { "Hearts", "Diamonds", "Clubs", "Spades"}; char faceName[13][6] = {"Ace", "Deuce", "Three", "Four", "Five", "Six", "Seven", "Eight", "Nine", "Ten", "Jack", "Queen", "King"}; int deck[4][13]; srand(time(0)); shuffle(deck); deal(deck, suiteName, faceName); } void shuffle(int deck[4][13]) { int card; int suite, face; for (suite=0; suite<4; suite++) for (face=0; face<13; face++) deck[suite][face] = -1; for (card=0; card<52; card++) { do { suite = rand() % 4; face = rand() % 13; } while (deck[suite][face]!=-1); deck[suite][face] = card; } } void deal(int deck[4][13], char suiteName[][9], char faceName[][6]) { int i, j; int card; for (card=0; card<52; card++) { for (i=0; i<4; i++) for (j=0; j<13; j++) if (deck[i][j] == card) printf("%d:%s of %s\n", card+1, faceName[j], suiteName[i]); } }

與指標等效的陣列語法

char s1[]="hello"; char s2[]="world"; ... for (;(*s1=*s2)!='\0';s1++,s2++);

char s1[]="hello"; char s2[]="world"; int i; i=0; while (s1[i]!='\0') { s1[i] = s2[i]; i=i+1; }

回程式設計課程首頁

製作日期: 03/27/2003 by 丁培毅 (Pei-yih Ting)
E-mail: pyting@cs.ntou.edu.tw TEL: 02 24622192x6615
海洋大學理工學院資訊科學系 Lagoon