c語言 typedef

C programming Typedef Aptitude Questions and Answers: In this section you will find C Aptitude Questions and Answers on typedef topics, defining/changing name of any data type, using and accessing the typedef values.

C編程Typedef Aptitude問答：在本節(jié)中，您將找到有關(guān)typedef主題的C Aptitude問答，定義/更改任何數(shù)據(jù)類型的名稱，使用和訪問typedef值。

1) What will be the output of following program ? #include < stdio.h > int main() {typedef int AAA,BBB,CCC,DDD;AAA aaa=10;BBB bbb=20;CCC ccc=30;DDD ddd=40;printf("%d,%d,%d,%d",aaa,bbb,ccc,ddd);return 0; }

Error

10,10,10,10

10,20,30,40

AAA,BBB,CCC,DDD

Answer Correct Answer - 3
10,20,30,40
1)以下程序的輸出是什么？

錯誤

10,10,10,10

10,20,30,40

AAA，BBB，CCC，DDD

回答 正確答案-3
10,20,30,40
2) What will be the output of following program? #include < stdio.h > int main() {typedef auto int AI;AI var=100;printf("var=%d",var);return 0; }

var=100

var=AI

var=0

Error

Answer Correct Answer - 4
Error : more than one storage classes/ many storage classes.
Since typedef is used to define the name of data type, here auto is a storage class, can not be type defined. 2)以下程序的輸出是什么？

var = 100

var = AI

var = 0

錯誤

回答 正確答案-4
錯誤：多個存儲類別/多個存儲類別。
由于typedef用于定義數(shù)據(jù)類型的名稱，因此auto是一個存儲類，無法進(jìn)行類型定義。 .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() {typedef char* string;string myName="ABCDEFG";printf("myName=%s (size=%d)",myName,sizeof(myName));return 0; }

myName=ABCDEFG (size=7)

Error

myName=ABCDEFG (size=4)

myName=ABCDEFG (size=8)

Answer Correct Answer - 3
myName=ABCDEFG (size=4).
In this program char* has defined as string, statement string myName="ABCDEFG"; is char* myName="ABCDEFG" which is a character pointer, takes 4 bytes(on 32 bit compiler) in memory. 3)以下程序的輸出是什么？

myName = ABCDEFG(大小= 7)

錯誤

myName = ABCDEFG(大小= 4)

myName = ABCDEFG(大小= 8)

回答 正確答案-3
myName = ABCDEFG(大小= 4)。
在該程序中，char *已定義為字符串，語句字符串myName =“ ABCDEFG”; 是char * myName =“ ABCDEFG” ，它是一個字符指針，在內(nèi)存中占用4個字節(jié)(在32位編譯器上)。 4) What will be the output of following program? #include < stdio.h > int main() {typedef struct {int empid;int bsal;}EMP;EMP E={10012,15100};printf("%d,%d",E.empid,E.bsal);return 0; }

10012,15100

0,0

ERROR

10012,10012

Answer Correct Answer - 1
10012,15100.
4)以下程序的輸出是什么？

10012,15100

0,0

錯誤

10012,10012

回答 正確答案-1
10012,15100。

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

c語言 typedef

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