C primer plus Summary

Well, it's an entry level. It's a collection of small issues and easy-to-be-ignored things I 've made when learning this book.

At the same time, he expressed contempt for the predecessor who invented the notebook touchpad.

I am stupid. I have made a lot of problems before, but I am slow at sorting out ...........

I will review C primer plus and prepare for the next step of in-depth study of C language and data structure.

Chapter 2

1,

Printf () applies % F, % E, % E, % G, % G. To both float and double types.

While scanf () only applies them to the float type, and "L" (l) modifier is required for the double type.

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,

Enter a maximum scanf field width.

Scanf modifier: The maximum field width of digit (s). When the maximum field width is reached or the first white space character is encountered (whichever occurs first)

Stop reading input items

Example: "% 10s"

On page 79, 4.7

3,

* Different services are prompted in scanf. When it is placed between % and the English letter, it causes the function to skip the corresponding input.

Project. Program listing 4.17 provides an example.

/* Skip2.c -- skip the two integers in the input header */# include <stdio. h> int main (void) {int N; printf ("Please enter three integers: \ n"); scanf ("% * D % d ", & N); printf ("the last integer was % d \ n", n); Return 0 ;}

Output

Please enter three Integers

2004 2005 2006

The previous integer was 2006

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4,

Place a blank character between two conversion specifiers to ensure that a number is not output together with the next digit even if it overflows its own field.

This is because the regular characters (including spaces) in the control string are printed.

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