c-style字符字符串

C programming String Aptitude Questions and Answers: In this section you will find C Aptitude Questions and Answers on Strings, String is the set of characters and String related Aptitude Questions and Answers you will find here.

C編程String Aptitude問答：在本節(jié)中，您將找到有關(guān)字符串的C Aptitude問答，String是字符集，與String相關(guān)的Aptitude問答在這里可以找到。

1) What will be the output of following program ? #include <stdio.h> #include <string.h> int main() {int val=0;char str[]="IncludeHelp.Com";val=strcmp(str,"includehelp.com");printf("%d",val); return 0; }

0

1

-1

Error

Answer Correct Answer - 3
-1
Strings are not equal, hence strcmp will return -1. 1)以下程序的輸出是什么？

0

1個(gè)

-1

錯(cuò)誤

回答 正確答案-3
-1
字符串不相等，因此strcmp將返回-1。 2) What will be the output of following program ? #include <stdio.h> #include <string.h>int main() {char str[];strcpy(str,"Hello");printf("%s",str);return 0; }

Hello

Error

No Output

Null

Answer Correct Answer - 2
Error: 'str' Unknown Size
At the time of str declaration, size is empty, it may be possible when you are initializing string with declaration (like char str[]="Hello"; 2)以下程序的輸出是什么？

你好

錯(cuò)誤

無輸出

空值

回答 正確答案-2
錯(cuò)誤：“ str”未知大小
在str聲明時(shí)，size為空，當(dāng)您使用聲明初始化字符串時(shí)(例如char str [] =“ Hello”; .minHeight{min-height: 250px;}@media (min-width: 1025px){.minHeight{min-height: 90px;}} .minHeight{min-height: 250px;}@media (min-width: 1025px){.minHeight{min-height: 90px;}} 3) What will be the output of following program ? #include <stdio.h> int main() {char str[8]="IncludeHelp";printf("%s",str);return 0; }

IncludeHelp

IncludeH

Error

No Output

Answer Correct Answer - 3
Error: Too many initializers/ array bounds overflow.
3)以下程序的輸出是什么？

包括幫助

包含H

錯(cuò)誤

無輸出

回答 正確答案-3
錯(cuò)誤：初始化程序/數(shù)組邊界過多。
4) What will be the output of following program ? #include <stdio.h> #include <string.h> int main() {char str1[]="IncludeHelp",str2[]=".Com";printf("%s",str1+strlen(str2));return 0; }

IncludeHelp.Com

udeHelp

Error

IncludeHelp4

Answer Correct Answer - 2
udeHelp
Look the expression str1+strlen(str2)=> str1+4, since str1 is a character array, and str1+4 will point 4th index of str1, then udeHelp will print. 4)以下程序的輸出是什么？

IncludeHelp.Com

udeHelp

錯(cuò)誤

包括幫助4

回答 正確答案-2
udeHelp
查看表達(dá)式str1 + strlen(str2)=> str1 + 4，因?yàn)閟tr1是一個(gè)字符數(shù)組，并且str1 + 4將指向str1的第4個(gè)索引，然后將輸出udeHelp。 .minHeight{min-height: 250px;}@media (min-width: 1025px){.minHeight{min-height: 90px;}} .minHeight{min-height: 250px;}@media (min-width: 1025px){.minHeight{min-height: 90px;}} 5) What will be the output of following program ? #include <stdio.h> int main() {char str[]="Hello%s%dFriends";printf(str);printf("\n");printf("%s",str);return 0; }

HelloFriends
HelloFriends

Hello%s%dFriends
Hello%s%dFriends

Hello(null)0Friends
Hello%s%dFriends

Garbage Value

Answer Correct Answer - 3
Hello(null)0Friends
Hello%s%dFriends
printf("%s",str); prints all string, but printf(str) prints the value instead of %s, %d .. etc (default value for %s is null and %d is 0. 5)以下程序的輸出是什么？

你好朋友
你好朋友

你好％s％dFriends
你好％s％dFriends

您好(空)0個(gè)朋友
你好％s％dFriends

垃圾價(jià)值

回答 正確答案-3
您好(空)0個(gè)朋友
你好％s％dFriends
printf(“％s”，str); 打印所有字符串，但printf(str)打印該值，而不是％s，％d等。(％s的默認(rèn)值為null，％d為0。 6) What will be the output of following program ? #include <stdio.h> int main() {int i;char str[]="IncludeHelp";for(i=0;str[i]!='\0';i++){putchar(str[i]); putchar('*');}return 0; } Answer I*n*c*l*u*d*e*H*e*l*p*
. 6)以下程序的輸出是什么？ 回答 I * n * c * l * u * d * e * H * e * l * p *
。 .minHeight{min-height: 250px;}@media (min-width: 1025px){.minHeight{min-height: 90px;}} .minHeight{min-height: 250px;}@media (min-width: 1025px){.minHeight{min-height: 90px;}} 7) What will be the output of following program ? #include <stdio.h> int main() {char str[]="value is =%d";int a='7';str[11]='c';printf(str,a);return 0; }

value is =%d

value is =%c

value is =55

value is =7

Answer Correct Answer - 4
value is =7
We can assign '7' into integer variable a, a will be 55, but str[11]='c' statement will replace 11th character of str 'd' to 'c', hence str will be "value is =%c.
and statement printf(str,a); will print "value is=7". 7)以下程序的輸出是什么？

值是=％d

值是=％c

值是= 55

值= 7

回答 正確答案-4
值= 7
我們可以將'7'分配給整數(shù)變量a，a將為55，但是str [11] ='c'語句會(huì)將str'd'的第11個(gè)字符替換為'c'，因此str將為“ value is =％c 。
和語句printf(str，a); 將顯示“值is = 7”。 8) What will be the output of following program ? #include <stdio.h> int main() {char result,str[]="\0IncludeHelp";result=printf("%s",str);if(result)printf("TRUE");elseprintf("FALSE");return 0; }

\0IncludeHelpTRUE

\0IncludeHelpFALSE

Error

FALSE

Answer Correct Answer - 4
FALSE
str[]="\0IncludeHelp", str will be terminated by \0. 8)以下程序的輸出是什么？

\ 0IncludeHelpTRUE

\ 0包括HelpFALSE

錯(cuò)誤

假

回答 正確答案-4
假
str [] =“ \ 0IncludeHelp”，str將以\ 0終止。 .minHeight{min-height: 250px;}@media (min-width: 1025px){.minHeight{min-height: 90px;}} .minHeight{min-height: 250px;}@media (min-width: 1025px){.minHeight{min-height: 90px;}} 9) What will be the output of following program ? #include <stdio.h> #include <string.h> int main() {if( printf("Hello") == strlen("Hello") )printf("...Friends");elseprintf("...Enemies");return 0; }

Hello...Friends

Hello...Enemies

...Friends

...Enemies

Answer Correct Answer - 1
Hello...Friends
Statement printf("Hello") will print "Hello" and return 5, and statement strlen("Hello") will return total number of characters (5) , hence condition is true. 9)以下程序的輸出是什么？

你好朋友

你好...敵人

...朋友

...敵人

回答 正確答案-1
你好朋友
語句printf(“ Hello”)將打印“ Hello”并返回5，語句strlen(“ H??ello”)將返回字符總數(shù)(5)，因此條件為true。 10) What will be the output of following program ? #include <stdio.h> #include <string.h> int main() {char s1[]="IncludeHelp";char s2[10];strncpy(s2,s1,5);printf("%s",s2);return 0; }

Inclu

IncluGARBAGE_VALUE

Error

IncludeHelp

Answer Correct Answer - 2
IncluGARBAGE_VALUE
strncpy is used to copy number of characters from one string to another...
strncpy(s2,s1,5) will move 5 characters from s1 to s2, but there is no NULL ('\0') character to terminate the string s2...IncluGARBAGE_VALUE will print. 10)以下程序的輸出是什么？

包含

IncluGARBAGE_VALUE

錯(cuò)誤

包括幫助

回答 正確答案-2
IncluGARBAGE_VALUE
strncpy用于將字符數(shù)從一個(gè)字符串復(fù)制到另一字符串...
strncpy(s2，s1,5)將5個(gè)字符從s1移至s2，但是沒有NULL('\ 0')字符可終止字符串s2。 將顯示IncluGARBAGE_VALUE。 .minHeight{min-height: 250px;}@media (min-width: 1025px){.minHeight{min-height: 90px;}} .minHeight{min-height: 250px;}@media (min-width: 1025px){.minHeight{min-height: 90px;}} 11) What will be the output of following program ? #include <stdio.h> #include <string.h> int main() {char str[50]="IncludeHelp";printf("%d...%d",strlen(str),sizeof(str));return 0; }

50...50

11...50

11...11

50...11

Answer Correct Answer - 2
11...50
strlen returns the number of characters, and sizeof(str) returns total occupied size by str. 11)以下程序的輸出是什么？

50 ... 50

11 ... 50

11 ... 11

50 ... 11

回答 正確答案-2
11 ... 50
strlen返回字符數(shù)， sizeof(str)返回按str占用的總大小。 12) What will be the output of following program ? #include <stdio.h> int main() {char *str="IncludeHelp";while(*str)printf("%s\n",str++);return 0; }

IncludeHelp
IncludeHel
IncludeHe
..
I

IncludeHelp
ncludeHelp
cludeHelp
..
P

ERROR

IncludeHelp

Answer Correct Answer - 2
12)以下程序的輸出是什么？ #include <stdio.h> int main() {char *str="IncludeHelp";while(*str)printf("%s\n",str++);return 0; }

包括幫助
包括Hel
包括他
..
一世

包括幫助
nclude幫助
cludeHelp
..
P

錯(cuò)誤

包括幫助

回答 正確答案-2
.minHeight{min-height: 250px;}@media (min-width: 1025px){.minHeight{min-height: 90px;}} .minHeight{min-height: 250px;}@media (min-width: 1025px){.minHeight{min-height: 90px;}} 13) What will be the output of following program ? #include <stdio.h> #define string char* int main() {string myName="IncludeHelp";printf("My name is =%s",myName);return 0; }

IncludeHelp

Error

char*

myName

Answer Correct Answer - 1
IncludeHelp
string will be replaced by char *. 13)以下程序的輸出是什么？

包括幫助

錯(cuò)誤

字符*

我的名字

回答 正確答案-1
包括幫助
字符串將被替換為char *。 14) What will be the output of following program ? #include <stdio.h> #include <string.h> int main() {printf("%d...%d",sizeof("Hello"),strlen("Hello"));return 0; }

5...5

6...6

5...6

6...5

Answer Correct Answer - 4
6...5
sizeof operator returns the size of the string including NULL character, and strlen returns the number of characters stored in string. 14)以下程序的輸出是什么？

5 ... 5

6 ... 6

5 ... 6

6 ... 5

回答 正確答案-4
6 ... 5
sizeof運(yùn)算符返回字符串的大小(包括NULL字符)，而strlen返回存儲(chǔ)在字符串中的字符數(shù)。 15) What will be the output of following program ? #include <stdio.h> #include <string.h> int main(){char str[]="Ihelp";while(str+strlen(str))printf("*");return 0; }

ERROR

No output

***... infinite times

*

Answer Correct Answer - 3
***... infinite times
str+strlen(str) in this expression str is a pointer that return memory address and str+strlen(str) = str+5, also an address (integer value), so expression str+strlen(str) will return non zero value. 15)以下程序的輸出是什么？

錯(cuò)誤

無輸出

*** ...無限次

*

回答 正確答案-3
*** ...無限次
STR + strlen的(STR)在這個(gè)表達(dá)式str是一個(gè)指針返回存儲(chǔ)器地址和STR + strlen的(STR)= STR + 5，也是一個(gè)地址(整數(shù)值)，所以表達(dá)STR +的strlen(STR)將返回非零值。

翻譯自: https://www.includehelp.com/c-programs/c-strings-aptitude-questions-and-answers.aspx

c-style字符字符串

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