Today, let's talk about escape characters [cute new version]

No addition '\' The output characters , Output characters directly

#include<stdio.h>
int main()
{
	printf("a");
	return 0;

result ：
Conclusion ：

1. It can be seen that , When we want to output characters , We can use it directly printf Output .
2. When characters are required , It is simpler to output characters directly .

---

need '\' Output escape characters

Simply output characters ：

#include<stdio.h>
int main()
{
	printf("%c",'a');
	return 0;

}

result ：
Conclusion ： Output with escape characters is the same as direct output

Escape characters are used and calculated ：

#include<stdio.h>
int main()
{
	printf("%c\n",'a');
	printf("%c\n",'a'-32);
	return 0;

}

  result ：

  Conclusion ： When it is necessary to calculate by characters , It is more convenient to use escape characters

Tips （a Of ASCII Code for 97,A Of ASCII Code is 65）

ASCII Code comparison table （ Reference resources ）

 

It can be seen that we can use the computer to calculate different characters by the number corresponding to each character

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Escape character （8 Base and 16 Base representation ）

#include<stdio.h>
int main()
{
	printf("%c\n",'\123');  //8 Base number 
	printf("%c\n",'\x33');  //16 Base number 
	return 0;

}

result ：

  Conclusion ：

1. first 8 Hexadecimal escape character , The calculation for the ：1*8^2 + 2*8 + 3 = 115  Corresponding ASCII Code for s character
2. the second 16 Base escape character , The calculation for the ：3*16 + 3 = 51 Corresponding ASCII Code for 3 character --> '3'

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summary

1. You can see it , You can output characters in different ways when you need them
2. But there is character conversion or calculation , It is more convenient for us to use escape characters