實驗10指針做函數(shù)參數(shù)編程訓(xùn)練

1、實驗10指針做函數(shù)參數(shù)編程訓(xùn)練實驗?zāi)康模?.掌握指針的定義及使用；2.體會使用指針的作用；3.掌握指針做函數(shù)參數(shù)的作用；4.掌握指針做函數(shù)參數(shù)的基本步驟；實驗題目：1.輸入某年某月某日，計算并輸出它是這一年的第幾天。/*函數(shù)功能：對給定的某年某月某日，計算它是這一年第幾天函數(shù)參數(shù)：整型變量year,month,day,分別代表年，月，日函數(shù)返回值：這一年的第幾天*/int DayofYear(int year,int month,int day;2.輸入某一年的第幾天，計算并輸出它是這一年的第幾月第幾日。/*函數(shù)功能：對給定的某一年的第幾天，計算它是這一年的第幾月第幾日函數(shù)入口參數(shù)：整型變量y

2、ear，存儲年整型變量yearDay,存儲這一年的第幾天函數(shù)出口參數(shù)：整型指針pMonth，指向存儲這一年第幾月的整型變量整型指針pDay，指向存儲第幾日的整型變量函數(shù)返回值：無*/void MonthDay(int year,int yearDay,int *pMonth,int *pDay;3.輸出如下菜單，用switch語句實現(xiàn)根據(jù)用戶輸入的選擇執(zhí)行相應(yīng)的操作。1.year/month/day->yearDay2.yearDay->year/month/dayPlease enter your choice:參考程序及注釋：#include <stdio.h>#i

3、nclude <stdlib.h>int DayofYear(int year, int month, int day;void MonthDay(int year, int yearDay, int *pMonth, int *pDay;void Menu(void;int dayTab213 = 0,31,28,31,30,31,30,31,31,30,31,30,31, 0,31,29,31,30,31,30,31,31,30,31,30,31;int main(int year, month, day, yearDay;char c;Menu(; /* 調(diào)用Menu函數(shù)顯示

4、一個固定式菜單 */c = getchar(; /* 輸入選擇 */switch (c /* 判斷選擇的是何種操作 */case '1':printf("Please enter year, month, day:"scanf("%d,%d,%d", &year, &month, &day;yearDay = DayofYear(year, month, day;printf("yearDay = %dn", yearDay;break;case '2':printf("

5、;Please enter year, yearDay:"scanf("%d,%d", &year, &yearDay;MonthDay(year, yearDay, &month, &day;printf("month = %d, day = %dn", month, day;break;case '3':exit(0; /* 退出程序的運行 */default:printf("Input error!"return 0;/* 函數(shù)功能：對給定的某年某月某日，計算并返回它是這

6、一年的第幾天 */int DayofYear(int year, int month, int dayint i, leap;/* 若year為閏年，即leap值為1，則用第1行元素dayTab1i計算；否則leap值為0，用第0行dayTab0i計算 */leap = (year % 4 = 0 && (year % 100 != 0 | (year % 400 = 0;for (i=1; i day = day + dayTableapi;return day; /* 返回計算出的day的值 */* 函數(shù)功能：對給定的某一年的第幾天，計算它是這一年的第幾月第幾日 */voi

7、d MonthDay(int year, int yearDay, int *pMonth, int *pDayint i, leap;leap = (year % 4 = 0 && (year % 100 != 0 | (year % 400 = 0;for (i=1; yearDay>dayTableapi; i+yearDay = yearDay - dayTableapi;*pMonth = i; /* 將計算出的月份值賦值給pMonth所指向的變量 */*pDay = yearDay; /* 將計算出的日號賦值給pDay所指向的變量 */* 函數(shù)功能：顯示菜單

8、*/void Menu(voidprintf("1. year/month/day -> yearDayn"printf("2. yearDay -> year/month/dayn"printf("3. Exitn"printf("Please enter your choice:"實驗11 字符串與指針編程練習(xí)實驗?zāi)康模?. 熟悉字符串的輸入及輸出2. 掌握字符指針做函數(shù)參數(shù)的方法3. 掌握數(shù)組做函數(shù)參數(shù)的方法實驗題目：1. 編寫一函數(shù)實現(xiàn)字符串的反序輸出，函數(shù)原型如下：void invert(ch

9、ar *s;即將字符串s反序。解題思路:用循環(huán)將串s的首尾字符對調(diào)，直到中間位置結(jié)束。如：串“ABCDE0”，將A與E對調(diào)(交換，B與D對調(diào)，循環(huán)次數(shù)是串的實際長度的一半。2. 在主函數(shù)main中輸入一串字符串，并調(diào)用invert函數(shù)將此字符串反序，然后再將反序后的字符串輸出。3. 編寫一函數(shù)將字符串s中的字符c刪除void charDel(char *s,char c;解題思路：假設(shè)s為“aebefe0”串中的e字符刪除，判斷當前s指針是否指向e字符，若指向e字符，則將e字符后面的befe0字符向前移動一位，然后移動s指針，重復(fù)這一過程。4. 編寫函數(shù)void replace(char *s

10、,char c1,char c2實現(xiàn)將s所指向的字符串中所有字符c1用c2替換，字符串，字符c1和c2均在主函數(shù)中輸入，將原始字符串和替換后的字符串顯示在屏幕上。解題思路：如果當前s指針指向的是c1字符，則把c2賦值給s指針所指向的地址空間，然后移動指針s，重復(fù)上述過程。參考代碼：#include "stdio.h"#include "string.h"void replace(char *s,char c1,char c2;void charDel(char *s,char c;void invert(char *s;int main(char str

11、="acbd"invert(str;puts(str;void invert(char *sint strLenth;char *i,*j,*mid,temp;/j和i所指向字符是相互交換的字符strLenth=strlen(s;mid=s+strLenth/2;/交換的次數(shù)應(yīng)為字符串總長度除以2j=s+strLenth-1;/令j指向字符串的末尾，0字符的前一個字符for(i=s;i<mid;i+/i=s令i指針指向字符串的首部，i+令i指針指向下一個字符temp=*i;*i=*j;*j=temp;/交換對應(yīng)的字符j-;/字符串末尾指向前移void charDel(char *s,char cchar *p,*q;while(*s!='0'if(*s=cp=s;q=s+1