Which statement correctly establishes a file pointer? file quake: File *QUAKE: F

ID: 3858649 • Letter: W

Question

Which statement correctly establishes a file pointer? file quake: File *QUAKE: FILE *quake: file *quake: To read in 200 lines in a file with a control number, it is best to use a while loop in C. True False What is the C command used to open a data file? fopenf open openf fopen The three modes of opening a file in C are read, write, and append. True False In C, 10 read in data from an external file at file path C: Desktopmy_data.txt to file pointer myfile (assume this has been declared), which statement should be used? myfile = open(degree C: \Desktop\my_data.txt", "r");

Explanation / Answer

Question 37:

Which statement correctly establishes a file pointer?

Answer :

FILE *quake;

Explanation:

In C programming working with files , we need to declare a pointer of a type file. This declaration is used for communciation between the file and program.

Syntax : FILE *fptr;

Question 38

To read in 200 lines in a file with a control number , it is best to use a while loop in C.

Answer:

Yes

Explanation :

Yes we can use while loop to read in 200 lines in a file with a control number.

Question 39

What is the C command used to open a data file?

Answer:

fopen

Expalanation :

To open a file in C : opening a file is using fopen()

Syntax : fp = fopen(“fileopen” , “mode”)

For example fopen(“C:\cprogram\abc.txt”,”w”);

Question 40 :

The three modes of opening a file in C are read , write , and append.

Answer :

Yes

Exaplanation :

File can be opened in basic three modes : read , write and append mode. If file is not present on the path specified then new file can be created using write and append mode.

Examples :

Reading mode : fp = fopen(“abc.txt”,”r”);

Writing mode : fp = fopen(“abc.txt”,”w”);

Append mode : fp = fopen(“abc.txt”,”a”);

Question 40

In C , to read in data from an external file path C:\Desktopmy_data.txt to file pointer myfile (assume this has been declared), which statement should be used?

Answer:

Myfile = fopen(“C:\Desktopmy_data.txt” , “r”);

Expalanation :

The above file is in read mode . it is read in data from an external file path C:\Desktopmy_data.txt.