Comment math sign in programming languages:
| Character | Meaning | Arguments | Return Type |
|---|---|---|---|
| + | Plus Sign | int,int | int |
| - | Minus Sign | int,int | int |
| * | Multiplication | int,int | int* |
| / | Division | int,int | int |
| % | Percent Sign or modulus operator | int,int | int |
| () | Parentheses | array,int | type of lhs |
| {} | Curly braces | array,int | type of lhs |
| [] | Square brackets | array,int | type of lhs |
| = | Equal Sign | equal types + arrays | type of lhs |
| ? | Question mark | any array | type of array |
| ! | Exclamation mark | bool | bool |
| & | ampersand | bool,bool | bool |
| l | pipe character | bool,bool | bool |
“\n” means newline and “\b” means backspace.
‘ single quote as a character
“ double quote as a string
Data types
| Storage Size | Min to Max | char |
|---|---|---|
| 1 | –127 to 127 | int |
| 2 | –32,767 to 32,767 | float |
| 4 | 1E–37 to 1E+37 with six digits of precision | double |
| 8 | 1E–37 to 1E+37 with ten digits of precision | long double |
| 10 | 1E–37 to 1E+37 with ten digits of precision | long int |
| 4 | –2,147,483,647 to 2,147,483,647 | short int |
| 2 | –32,767 to 32,767 | unsigned short int |
| 2 | 0 to 65,535 | signed short int |
| 2 | –32,767 to 32,767 | long long int |
| 8 | –(2power(63) –1) to 2(power)63 –1 | signed long int |
| 4 | –2,147,483,647 to 2,147,483,647 | unsigned long int |
| 4 | 0 to 4,294,967,295 | unsigned long long int |
| 8 | 2(power)64 –1 |
Those are the comment size and math signal.
Decimal: 0, 1, 22 etc
Increase by 10
Octal: 021, 076, 033 etc
Increase by 8
Hexadecimal: 0x7f, 0x2b, 0x521 etc
Increase by 16
Example code as:
#include <stdio.h>
int main(void)
{
printf("Hello, World!\n");
return 0;
}
Which should save as XXX.c
After compilation, the program will have XXX.h which is been created.
iThome鐵人賽
看影片追技術