1、第四次上機作業參考答案:1.數組轉置在主函數中定義一個n(1<=n<=6)維方陣，并從鍵盤讀入數組元素；編寫函數transpose(a,n)實現數組a轉置；在主函數中輸出轉置后的方陣。例：輸入412345678910111213141516輸出15926103711481213141516#include<stdio.h>#defineN6voidtranspose(intaN,intn);voidmain()intn,i,j;intaNN;printf("Inputn(n<=6):");scanf("%d",&n)

2、;printf("Inputthearray:'n");for(i=0;i<n;i+)for(j=0;j<n;j+)scanf("%d",&aij);printf("Displaythearray:'n");for(i=0;i<n;i+)for(j=0;j<n;j+)printf("%-4d",aij);printf("n");transpose(a,n);printf("Displaythetransposedarray:'n&

3、quot;);for(i=0;i<n;i+)for(j=0;j<n;j+)printf("%-4d",aij);printf("'n");voidtranspose(intaN,intn)inti,j,t;for(i=0;i<n;i+)for(j=0;j<i;j+)a皿尸a皿i;a皿i=t;2.學生信息t=aij編寫4個函數實現下列功能:(1) 函數input()輸入20個學生姓名和高考總分；(2) 函數sort()按高考總分從高到低的順序排序，姓名順序也隨之調整；(3) 函數display。顯示學生姓名及其高考總分；(4

4、) 在主函數中輸入一個姓名，編寫函數search()用順序查找方法找出該學生。若查找成功，在主函數中顯示該生姓名及其高考總分；否則顯示查找失敗。# include<stdio.h># include<string.h># defineN3# defineLEN80voidinput(charnameLEN,floats);voiddisplay(charnameLEN,floats);voidsort(charnameLEN,floats);intsearch(charnameLEN,chars);voidmain()# intnum;charnameNLEN,stud

5、entLEN;floatscoreN;input(name,score);puts("Beforesorting:");display(name,score);sort(name,score);puts("Aftersorting:");display(name,score);printf("Inputstudentnameyouwanttosearch:");fflush(stdin);gets(student);num=search(name,student);if(num=-1)puts("SearchFailure!

6、");elseprintf("%s'sscoreis%.2fn",student,scorenum);voidinput(charnameLEN,floats)inti;printf("lnputnameandscore:n");for(i=0;i<N;i+)scanf("%s",namei);scanf("%f",&si);voiddisplay(charnameLEN,floats)inti;printf("Displaynameandscore:n");fo

7、r(i=0;i<N;i+)printf("%-10s",namei);printf("%.2fn",si);voidsort(charnameLEN,floats)inti,j,k;floatt;charstringLEN;for(i=0;i<N-1;i+)k=i;for(j=i+1;j<N;j+)if(sj>sk)k=j;if(k!=i)t=si;si=sk;sk=t;strcpy(string,namei);strcpy(namei,namek);strcpy(namek,string);intsearch(charnameL

8、EN,chars)inti;for(i=0;i<N;i+)if(strcmp(namei,s)=0)returni;return-1;3.字符串處理定義兩個C源程序文件：fmain.c和fstring.c。fmain.c中包含主函數，實現字符串處理功能選項和字符串的輸入與結果的輸出。fstring.c中包含兩個函數delchar(s,c)和strrev(s)，實現刪除字符和字符串反轉功能。delchar(s,c):在主函數中輸入字符串和要刪除的字符，此函數將字符串s中c字符刪除；再在主函數中輸出刪除后的字符串。strrev(s):在主函數中讀入字符串，此函數實現將字符串s反轉；再在主函數

9、中輸出反轉后的字符串。SAMPLEOUTPUT:1. Reverseastring.2. Deleteacharacterinastring.Pleaseinputyourchoice:1Enterastring:holidayReversedstringis:yadilohWouldyouliketocontinue?(y/n)Y1. Reverseastring.2. Deleteacharacterinastring.Pleaseinputyourchoice:2Enterastring:oneworld,onedreamEnteracharacteryouwanttodelete:oD

10、eletedstringis:newrld,nedreamWouldyouliketocontinue?(y/n)N/*fmain.c*/#include<stdio.h>#include"e:tempfstring.c"#defineN80voidstrreverse(chars);voiddelchar(chars,charc);voidmain()intchoice1;charchoice2,c,sN;while(1)printf("1.Reverseastring.n");printf("2.Deleteacharacter

11、inastring.n");printf("Pleaseinputyourchoice:");seanf("%d",&choice1);switch(choicel)case1:printf("Enterastring:");fflush(stdin);gets(s);strreverse(s);case 2:printf("Reversed string isprintf("Enter a string:");："）；puts(s)；fflush(stdin); gets(s

12、);printf("Enteracharacteryouwanttodelete:");fflush(std in); delchar(s,c);c=getchar();printf("Deleted string is:");puts(s);break;printf("Wouldyouliketocontinue?(y/n)");fflush(stdin);choice2=getchar();if(choice2='N'|choice2='n')break;/*fstring.c*/#include&

13、lt;string.h>voidstrreverse(chars口)inti,j;chart;j=strlen(s);j-;for(i=O;i<j;i+,j-)t=si;si=sj;sj=t;voiddelchar(chars,charc)inti,j;chartemp80;for(i=O,j=O;si!='O')if(si!=c)tempj+=si+;elsei+;tempj='0'for(i=0;tempi!='0'i+)si=tempi;si='0'4.分別用函數和帶參數的宏，從三個數中找出最大數/*函數方式實現*/#include<stdio.h>intmax(inta,intb,intc);voidmain()inta,b,c;printf("Input3integers:n");scanf("%d%d%d",&a,&b,&c);printf("Maxof%d,%d,%dis%dn",a,b,c,max(a,b,c);intmax(inta,intb,intc)intt;t=a<b?a:b;returnt>c?t:c;/*帶參數的宏方式實現*/#include<stdio.h>