File I/O: Strings

1. Create string str initialized to alphabet

2. Create a FILE pointer MyTxt

3. Open file message.txt for text write

4. Write string to file

5. Close the file

6. Open file for text read

7. Read string from file

8. Rewind to start of file

9. Read 5 characters from file

10. Position to letter 'j' in file

11. Read 5 characters starting at 'j' in file

Illustration 4:

41)In Illustration 4-1 What statement would create a string called str initialized to lower case alphabet?

A) char str[] = "abcdefghijklmnopqrstuvwxyz";

B) char str[] = {"abcdefghijklmnopqrstuvwxyz"};

C) char* str[] = "abcdefghijklmnopqrstuvwxyz";

D) char str[] = [abcdefghijklmnopqrstuvwxyz];

42)In Illustration 4-2 What statement would create a file pointer MyTxt?

A) MyTxt FILE*;

B) FILE MyTxt;

C) FILE* MyTxt;

D) MyTxt* FILE;

43)In Illustration 4-3 What statement would open the file message.txt to write text with MyTxt?

A) MyTxt = fopen("message.txt", "wb");

B) MyTxt = fopen("message.txt", "w");

C) MyTxt = fopen("w", "message.txt");

D) MyTxt = fopen("message.txt");

44)In Illustration 4-4 What statement would put str into message.txt file?

A) fputs(MyTxt);

B) fwrite(str, MyTxt);

C) fputs(MyTxt, str);

D) fputs(str, MyTxt);

45)In Illustration 4-4 What alternative statement would put str into message.txt file?

A) fprintf(str);

B) fprintf(MyTxt,str);

C) fprintf(MyTxt,%s);

D) fprintf(MyTxt,%s,str);

46)In Illustration 4-5What statement would close message.txt file?

A) fclose (MyTxt);

B) fclose(str);

C) FileClose(message.txt);

D) FILE(close, MyTxt);

47)In Illustration 4-6 What statement would open the file message.txt to read text with MyTxt?

A) MyTxt = fopen("message.txt");

B) MyTxt = fopen("message.txt", "rb");

C) MyTxt = fopen("message.txt", "r");

D) MyTxt = fopen( "r", "message.txt");

48)In Illustration 4-7What statement would read int buf[80]; from message.txt file?

A) fgets(buf, 80, MyTxt);

B) finput(buf, 80, MyTxt);

C) fgets(buf, MyTxt);

D) finput(80, MyTxt);

49)In Illustration 4-7 If the alphabet from message.txt file is read into buf, how many characters will be read?

A) 26 letters

B) 27 (26 letters + '\0')

C) 28 (26 letters + '\0')

D) 80

50)In Illustration 4-8 How can message.txt file rewind to the beginning?

A) rewind(message.txt);

B) rewind(MyTxt);

C) rewind(start);

D) rewind(80, MyTxt);

51)In Illustration 4-9 How can only 5 characters be read from message.txt file after rewind?

A) fgets(buf);

B) fgets(buf, 5, MyTxt);

C) fgets(buf, 6, MyTxt);

D) fgets(MyTxt, 5);

52)In Illustration 4-10 How can the file pointer be positioned just before the letter j in message.txt file?

A) fseek(fp, 9, SEEK_CUR);

B) fseek(fp, 9, SEEK_SET);

C) fseek(fp, 9, SEEK_END);

D) fseek(fp, 9);

53)In Illustration 4-10 How can 5 letters including the letter j be read from message.txt file after positioning the file pointer just before the letter j?

A) fgets(buf);

B) fgets(buf, 5, MyTxt);

C) fgets(buf, 6, MyTxt);

D) fgets(MyTxt, 5);