"Algorithm notes" learning record 001

Copyright: Attribution, allow others to create paper-based, and must distribute paper (based on the original license agreement with the same license Creative Commons )

First, today SLP

p1 ~ 13

Remarks:

1. int type: less than 10 ^ 9; 32-bit integer.
2. long long: less than 10 ^ 18; 64-bit integer.
3. Big 32 than lowercase letters uppercase letters ASCII code.
4. Character constants - must be a single character.
5. Character constants in single quotation marks, and double quotation mark string constants.
6. String constants can only be assigned to an array of characters, the character can not be assigned to a variable. (C language, C ++ has string type)
7. % .1f-- one decimal output.
8. Symbolic constants and const are constants defined constants of the two methods.
9. The end of the macro definition does not add a semicolon.

Second, today's code analysis

2.01

#include <stdio.h>
int main(){
	int a,b;
	scanf("%d%d",&a,&b);
	printf("%d",a+b);
	return 0;
}

Thinking:

	scanf("%d%d",&a,&b);

Proper operation: put a space becomes% d% d
wrong operation: adding a comma become% d,% d (can not give you the opportunity to enter the second parameter)

Third, the experience of reading

This book is useful structural expression, he said clearly wanted to read on.