高手眼中的TC(国外英文资料).docVIP

高手眼中的TC(国外英文资料) TC.txt love in the eyes of an expert, say it out loud, because you will never know, tomorrow and accident, which will come first! The stone tells us that all the beloved ones are scattered at last, and all the others are reunited. You never see my loneliest time, because when I cant see you, I am most lonely! TC in the eyes of a master An article for beginners using TC Author: swallow the rain Preface： TC is out of date, I said. Then a crowd of people asked, why is it out of date? TC isnt it good enough to use?, Its also used in textbooks, so Im speechless. // A. Header file problem Well, lets see a classic TC2 language program under the C in the old Tan (Second Edition), A section of code on page fourth: Main () { Printf (This is a C program.\n); } Well, then TC2 did allow printf and scanf to use without header files, It does allow main () to make such statements. Permission is allowed, but is it good for you to write it? For example, does the Basic language know? This language can be used without declaring variables. The same is true, but for me, Ill ask the compiler to force the check that the variables are declared and used again. Why? If you need to use the name nlen as a variable, one of them is accidentally written as n1en, The compiler does not tell you the error if it is not checked, but the result is wrong. But this mistake is in many lines How do you find it in the code? Especiallyland1 are so similar. Although the compiler allows, but you do not think that writing is good. To return to the new C code, TC2 allows no header files, As a result, many beginners are used to never writing a document, which means that the C language does not need a header file. OK, wait until you see the 138 page of that book, that character input and output, with the gets, Suddenly there was a #include stdio.h, and with a closer look, there were 100 words highlighted in the middle of the page It might be strange for beginners to use library functions, but not to