C語言基礎(chǔ)案例實(shí)操試題及答案試題1.請寫出以下程序的輸出結(jié)果。```cinclude<stdio.h>intmain(){inta=5,b=10;printf("%d\n",a+b);return0;}```2.編寫一個(gè)程序，計(jì)算并輸出兩個(gè)整數(shù)的乘積。3.請解釋下面代碼的錯(cuò)誤原因。```cinclude<stdio.h>intmain(){intnum;num=10.5;printf("%d\n",num);return0;}```4.編寫一個(gè)程序，將用戶輸入的華氏溫度轉(zhuǎn)換為攝氏溫度，轉(zhuǎn)換公式為`C=(F-32)5/9`。5.分析下面代碼的輸出結(jié)果。```cinclude<stdio.h>intmain(){intx=5;inty=x++;printf("x=%d,y=%d\n",x,y);return0;}```6.編寫一個(gè)程序，判斷一個(gè)整數(shù)是奇數(shù)還是偶數(shù)，并輸出相應(yīng)的結(jié)果。7.找出下面代碼中的邏輯錯(cuò)誤。```cinclude<stdio.h>intmain(){inta=5,b=10;if(a>b);printf("aisgreaterthanb\n");return0;}```8.編寫一個(gè)程序，輸入三個(gè)整數(shù)，輸出其中的最大值。9.分析下面代碼的輸出結(jié)果。```cinclude<stdio.h>intmain(){inti;for(i=0;i<5;i++){if(i==3){continue;}printf("%d",i);}return0;}```10.編寫一個(gè)程序，使用`while`循環(huán)計(jì)算1到100的整數(shù)和。11.指出下面代碼的錯(cuò)誤并改正。```cinclude<stdio.h>intmain(){intarr[5];for(inti=0;i<=5;i++){arr[i]=i;}return0;}```12.編寫一個(gè)程序，輸出一個(gè)一維數(shù)組的所有元素。13.分析下面代碼的輸出結(jié)果。```cinclude<stdio.h>intmain(){intarr[3][2]={{1,2},{3,4},{5,6}};printf("%d\n",arr[1][1]);return0;}```14.編寫一個(gè)程序，計(jì)算一個(gè)二維數(shù)組所有元素的和。15.解釋下面代碼中函數(shù)調(diào)用的過程。```cinclude<stdio.h>intadd(inta,intb){returna+b;}intmain(){intresult=add(3,5);printf("%d\n",result);return0;}```16.編寫一個(gè)函數(shù)，計(jì)算一個(gè)整數(shù)的階乘，并在`main`函數(shù)中調(diào)用該函數(shù)。17.找出下面代碼中的錯(cuò)誤。```cinclude<stdio.h>voidprintHello(){printf("Hello\n");}intmain(){printHello;return0;}```18.編寫一個(gè)函數(shù)，判斷一個(gè)字符是否為大寫字母。19.分析下面代碼的輸出結(jié)果。```cinclude<stdio.h>intfunc(intx){returnxx;}intmain(){intnum=3;printf("%d\n",func(num));return0;}```20.編寫一個(gè)程序，使用指針交換兩個(gè)整數(shù)的值。21.解釋下面代碼中指針的用法。```cinclude<stdio.h>intmain(){intnum=10;intptr=#printf("%d\n",ptr);return0;}```22.編寫一個(gè)程序，通過指針遍歷一個(gè)一維數(shù)組并輸出其元素。23.找出下面代碼的錯(cuò)誤。```cinclude<stdio.h>intmain(){intarr[5];intptr=arr;for(inti=0;i<6;i++){(ptr+i)=i;}return0;}```24.編寫一個(gè)函數(shù)，使用指針計(jì)算一個(gè)數(shù)組元素的和。25.分析下面代碼的輸出結(jié)果。```cinclude<stdio.h>intmain(){charstr[]="Hello";printf("%s\n",str);return0;}```26.編寫一個(gè)程序，計(jì)算一個(gè)字符串的長度。27.指出下面代碼的錯(cuò)誤并改正。```cinclude<stdio.h>intmain(){charstr[];str="Hello";printf("%s\n",str);return0;}```28.編寫一個(gè)函數(shù)，將一個(gè)字符串反轉(zhuǎn)。29.分析下面代碼的輸出結(jié)果。```cinclude<stdio.h>include<string.h>intmain(){charstr1[10]="Hello";charstr2[10]="World";strcat(str1,str2);printf("%s\n",str1);return0;}```30.編寫一個(gè)程序，比較兩個(gè)字符串是否相等。31.解釋下面代碼中結(jié)構(gòu)體的定義和使用。```cinclude<stdio.h>structStudent{charname[20];intage;};intmain(){structStudents1;strcpy(,"John");s1.age=20;printf("Name:%s,Age:%d\n",,s1.age);return0;}```32.編寫一個(gè)程序，定義一個(gè)包含學(xué)生信息（姓名、成績）的結(jié)構(gòu)體數(shù)組，并輸出所有學(xué)生的信息。答案1.輸出結(jié)果為：15。程序中定義了兩個(gè)整數(shù)變量`a`和`b`，將它們相加后使用`printf`輸出結(jié)果。2.```cinclude<stdio.h>intmain(){intnum1,num2;printf("Entertwointegers:");scanf("%d%d",&num1,&num2);intproduct=num1num2;printf("Theproductis:%d\n",product);return0;}```3.錯(cuò)誤原因：將一個(gè)浮點(diǎn)數(shù)`10.5`賦值給整數(shù)變量`num`，會發(fā)生數(shù)據(jù)截?cái)啵瑏G失小數(shù)部分。4.```cinclude<stdio.h>intmain(){floatfahrenheit,celsius;printf("EnterFahrenheittemperature:");scanf("%f",&fahrenheit);celsius=(fahrenheit-32)5/9;printf("Celsiustemperature:%f\n",celsius);return0;}```5.輸出結(jié)果為：`x=6,y=5`。`x++`是后自增運(yùn)算符，先將`x`的值賦給`y`，然后`x`再加1。6.```cinclude<stdio.h>intmain(){intnum;printf("Enteraninteger:");scanf("%d",&num);if(num%2==0){printf("%disanevennumber.\n",num);}else{printf("%disanoddnumber.\n",num);}return0;}```7.邏輯錯(cuò)誤：`if(a>b);`后面的分號導(dǎo)致`printf`語句無論條件是否成立都會執(zhí)行。應(yīng)去掉分號。8.```cinclude<stdio.h>intmain(){inta,b,c;printf("Enterthreeintegers:");scanf("%d%d%d",&a,&b,&c);intmax=a;if(b>max){max=b;}if(c>max){max=c;}printf("Themaximumis:%d\n",max);return0;}```9.輸出結(jié)果為：`0124`。當(dāng)`i`等于3時(shí)，執(zhí)行`continue`語句，跳過本次循環(huán)的剩余部分，繼續(xù)下一次循環(huán)。10.```cinclude<stdio.h>intmain(){inti=1,sum=0;while(i<=100){sum+=i;i++;}printf("Thesumof1to100is:%d\n",sum);return0;}```11.錯(cuò)誤：數(shù)組下標(biāo)越界。數(shù)組`arr[5]`的有效下標(biāo)是0到4，而循環(huán)中`i`的范圍是0到5。應(yīng)將`i<=5`改為`i<5`。12.```cinclude<stdio.h>intmain(){intarr[5]={1,2,3,4,5};for(inti=0;i<5;i++){printf("%d",arr[i]);}printf("\n");return0;}```13.輸出結(jié)果為：4。`arr[1][1]`表示二維數(shù)組中第2行第2列的元素（數(shù)組下標(biāo)從0開始）。14.```cinclude<stdio.h>defineROWS3defineCOLS2intmain(){intarr[ROWS][COLS]={{1,2},{3,4},{5,6}};intsum=0;for(inti=0;i<ROWS;i++){for(intj=0;j<COLS;j++){sum+=arr[i][j];}}printf("Thesumofallelementsis:%d\n",sum);return0;}```15.調(diào)用過程：在`main`函數(shù)中調(diào)用`add`函數(shù)，將實(shí)參3和5傳遞給`add`函數(shù)的形參`a`和`b`，`add`函數(shù)計(jì)算`a+b`的結(jié)果并返回，返回值賦給`main`函數(shù)中的`result`變量，最后輸出結(jié)果。16.```cinclude<stdio.h>intfactorial(intn){intresult=1;for(inti=1;i<=n;i++){result=i;}returnresult;}intmain(){intnum;printf("Enteraninteger:");scanf("%d",&num);intresult=factorial(num);printf("Thefactorialof%dis:%d\n",num,result);return0;}```17.錯(cuò)誤：函數(shù)調(diào)用時(shí)缺少括號。應(yīng)改為`printHello();`。18.```cinclude<stdio.h>include<ctype.h>intisUpperCase(charch){returnisupper(ch);}intmain(){charch;printf("Enteracharacter:");scanf("%c",&ch);if(isUpperCase(ch)){printf("Thecharacterisanuppercaseletter.\n");}else{printf("Thecharacterisnotanuppercaseletter.\n");}return0;}```19.輸出結(jié)果為：9。`func`函數(shù)接受一個(gè)整數(shù)參數(shù)，返回其平方值。20.```cinclude<stdio.h>voidswap(inta,intb){inttemp=a;a=b;b=temp;}intmain(){intnum1=10,num2=20;printf("Beforeswap:num1=%d,num2=%d\n",num1,num2);swap(&num1,&num2);printf("Afterswap:num1=%d,num2=%d\n",num1,num2);return0;}```21.指針用法：定義一個(gè)整數(shù)變量`num`，然后定義一個(gè)指針`ptr`指向`num`的地址，通過`ptr`可以訪問`num`的值。22.```cinclude<stdio.h>intmain(){intarr[5]={1,2,3,4,5};intptr=arr;for(inti=0;i<5;i++){printf("%d",(ptr+i));}printf("\n");return0;}```23.錯(cuò)誤：數(shù)組下標(biāo)越界。`arr[5]`的有效下標(biāo)是0到4，循環(huán)中`i`最大到5，會導(dǎo)致越界。應(yīng)將`i<6`改為`i<5`。24.```cinclude<stdio.h>intsumArray(intarr,intn){intsum=0;for(inti=0;i<n;i++){sum+=(arr+i);}returnsum;}intmain(){intarr[5]={1,2,3,4,5};intresult=sumArray(arr,5);printf("Thesumofthearrayis:%d\n",result);return0;}```25.輸出結(jié)果為：`Hello`。定義一個(gè)字符數(shù)組`str`并初始化為字符串`"Hello"`，使用`printf`輸出該字符串。26.```cinclude<stdio.h>include<string.h>intmain(){charstr[100];printf("Enterastring:");scanf("%s",str);intlen=strlen(str);printf("Thelengthofthestringis:%d\n",len);return0;}```27.錯(cuò)誤：`charstr[];`未指定數(shù)組大小，且不能直接將字符串賦值給數(shù)組名。應(yīng)改為`charstr[10]="Hello";`。28.```cinclude<stdio.h>include<string.h>voidreverseString(charstr){intlen=strlen(str);for(inti=0;i<len/2;i++){chartemp=str[i];str[i]=str[len-i-1];str[len-i-1]=temp;}}intmain(){charstr[100];printf("Enterastring:");scanf("%s",str);reverseString(str);printf("Reversedstring:%s\n",str);return0;}```29.輸出結(jié)果為：`HelloWorld`。`strcat`函數(shù)將`str2`連接到`str1`的末尾。30.```cinclude<stdio.h>include<string.h>intmain(){charstr1[100],str2[100];printf("