In C can a long printf statement be broken up into multiple lines

Question

I have the following statement   printf  name   s targs   s tvalue  d tarraysize  d n   sp- gt name  sp- gt args  sp- gt value  sp- gt arraysize     I want to break it up   I tried the following but it doesn t work   printf  name   s t args   s t value  d t arraysize  d n    sp- gt name   sp- gt args   sp- gt value   sp- gt arraysize     How can I break it up

User · Answer

I don t think using one printf statement to print string literals as seen above is a good programming practice  rather  one can use the piece of code below   printf  name   s t  sp- gt name   printf  args   s t  sp- gt args   printf  value   s t  sp- gt value   printf  arraysize   s t  sp- gt name

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Just some other formatting options   printf  name   s targs   s tvalue  d tarraysize  d n            a         b         c         d    printf  name   s targs   s tvalue  d tarraysize  d n                  a         b         c             d    printf  name   s t        args   s t        value  d t        arraysize  d n            very long name a  very long name b  very long name c  very long name d     You can add variations on the theme  The idea is that the printf   conversion speficiers and the respective variables are all lined up  nicely   for some values of  nicely

User · Answer

If you want to break a string literal onto multiple lines  you can concatenate multiple strings together  one on each line  like so   printf  name   s t   args   s t   value  d t   arraysize  d n    sp- gt name   sp- gt args   sp- gt value   sp- gt arraysize

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The C compiler can glue adjacent string literals into one  like  printf  foo   s           bar   d   foo  bar     The preprocessor can use a backslash as a last character of the line  not counting CR  or CR LF  if you are from Windowsland    printf  foo  s   bar   d   foo  bar

User · Answer

The de-facto standard way to split up complex functions in C is per argument   printf  name   s targs   s tvalue  d tarraysize  d n           sp- gt name          sp- gt args          sp- gt value          sp- gt arraysize     Or if you will   const char format str      name   s targs   s tvalue  d tarraysize  d n       printf format str          sp- gt name          sp- gt args          sp- gt value          sp- gt arraysize     You shouldn t split up the string  nor should you use   to break a C line  Such code quickly turns completely unreadable unmaintainable

[c] In C can a long printf statement be broken up into multiple lines?

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