puts() Implementation without the newline:

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puts() Implementation without the newline

• puts eg.c - puts study-no newline
• 30
• 31
• 32 / puts() implemented without the \n /
• 33 int puts2( char strng )
• 34
• 35 int ch
• 36 while( ch strng )
• 37 putchar( ch )
• 38 return / Note that the putchar('\n') has
  been dropped /
• 39

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puts() Implementation without the newline

• puts eg.c - puts study - main routine
• 1 include ltstdio.hgt
• 2 int main()
• 3
• 4 char seasons1 "Winter"
• 5 char seasons2 "Spring"
• 6
• 7 putchar('\n')
• 8
• 9 printf("Season1 written with puts1 is")
• 10 puts1(seasons1)
• 11 printf("Season2 written with puts1 is")
• 12 puts1(seasons2)
• 13
• 14 printf("Season1 written with puts2 is")
• 15 puts2(seasons1) / no '\n' sent to stdout /
• 16 printf("Season2 written with puts2 is")
• 17 puts2(seasons2)
• 18

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puts() Implementations

• puts eg.c - puts study - main routine
• 1
• 2 Season1 written with puts1 isWinter
• 3 Season2 written with puts1 isSpring
• 4 Season1 written with puts2 isWinterSeason2
  written with puts2 isSpring

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Copying A Longer String To A Shorter String

• mystrcpy.c - strcopy explorations
• 1 include ltstdio.hgt
• 2
• 3 int main()
• 4
• 5 char seasons1 "Winter"
• 6 char seasons2 "A Very Long Spring"
• 7
• 8 puts("Here is seasons1")
• 9 puts(seasons1)
• 10 puts("Here is seasons2")
• 11 puts(seasons2)
• 12
• 13 strcpy1(seasons1, seasons2)
• 14
• 15 puts("Here again is seasons1")
• 16 puts(seasons1)
• 17
• 18 puts("Now, here is seasons2") / seasons2
  overwritten? /

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Zooming In

• mystrcpy.c - strcopy explorations-lines 1-13
• 1 include ltstdio.hgt
• 2
• 3 int main()
• 4
• 5 char seasons1 "Winter"
• 6 char seasons2 "A Very Long Spring"
• 7
• 8 puts("Here is seasons1")
• 9 puts(seasons1)
• 10 puts("Here is seasons2")
• 11 puts(seasons2)
• 12
• 13 strcpy1(seasons1, seasons2)

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Zooming In

• mystrcpy.c - strcopy explorations-lines 14-22
• 14
• 15 puts("Here again is seasons1")
• 16 puts(seasons1)
• 17
• 18 puts("Now, here is seasons2") / seasons2
  overwritten? /
• 19 puts(seasons2)
• 20
• 21 return 0
• 22

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What Happened To seasons2?

• mystrcpy.log - strcopy output
• 1 Here is seasons1
• 2 Winter
• 3 Here is seasons2
• 4 A Very Long Spring
• 5 Here again is seasons1
• 6 A Very Long Spring
• 7 Now, here is seasons2
• 8 Long Spring

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Ex 9.2 1

• Determine the value of text, (text 3)), and
• (text 10), assuming that text is an array of
  characters and the
• following has been stored in the array
• a. now is the time
• b. rocky raccoon welcomes you
• c. Happy Holidays
• d. The good ship

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9.2 2a

• The following function, convert(), \marches
  along"
• the string passed to it and sends each character
  in the string one at
• a time to the toUpper() function until the Null
  character is
• encountered.

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Convert to Uppercase - array version

• 1 char toUpper(char) /function proto /
• 2
• 3 void convert(char strng) / convert a string
  to uppercase letters/
• 4
• 5 int i 0
• 6
• 7 while (strngi ! '\0')
• 8
• 9 strngi toUpper(strngi)
• 10 i
• 11
• 12 return
• 13

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Convert to Uppercase - called by convert()

• 1
• 2 char toUpper(char letter) / convert to uc /
• 3
• 4 if( letter gt 'a' letter lt 'z')
• 5 return(letter - 'a' 'A')
• 6 else
• 7 return (letter)
• 8

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9.2 2a - soln

• Convert to Uppercase - ptr version
• char toUpper(char) /function proto /
• void convert(char strng)
• while (strng ! '\0')
• strng toUpper(strng)
• return