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fortbite

A command-line calculator written in Fortran that handles arbitrary precision arithmetic, complex numbers, and matrices.

Building

make

Running

./build/bin/fortbite

Basic Usage

Arithmetic

fortbite> 2 + 3
5.0000000000000000

fortbite> 10 - 4 * 2
2.0000000000000000

fortbite> (10 - 4) * 2
12.000000000000000

fortbite> 2^8
256.00000000000000

fortbite> 27^(1/3)
3.0000000000000000

Precision Control

Specify output precision with ::digits

fortbite> pi
3.1415926535897931

fortbite> pi::10
3.1415926536

fortbite> pi::30
3.141592653589793115997963468544

fortbite> e::15
2.718281828459045

Variables

fortbite> x := 42
42.000000000000000

fortbite> y := x * 2
84.000000000000000

fortbite> x + y
126.00000000000000

Functions

Trigonometric

fortbite> sin(pi/2)
1.0000000000000000

fortbite> cos(0)
1.0000000000000000

fortbite> atan(1) * 4
3.1415926535897931

Logarithmic and Exponential

fortbite> log(e)
1.0000000000000000

fortbite> log10(1000)
3.0000000000000000

fortbite> exp(1)
2.7182818284590451

fortbite> 2^10
1024.0000000000000

Special Functions

fortbite> sqrt(2)
1.4142135623730951

fortbite> factorial(5)
120.00000000000000

fortbite> floor(3.7)
3.0000000000000000

fortbite> ceil(3.2)
4.0000000000000000

Complex Numbers

fortbite> (3 + 4i) * 2
6.0000000000000000+8.0000000000000000i

fortbite> abs(3 + 4i)
5.0000000000000000

fortbite> conj(3 + 4i)
3.0000000000000000-4.0000000000000000i

Matrices

fortbite> [1,2;3,4]
[2x2 matrix]
  1.0000000000000000  2.0000000000000000
  3.0000000000000000  4.0000000000000000

fortbite> A := [1,2;3,4]
[2x2 matrix]
  1.0000000000000000  2.0000000000000000
  3.0000000000000000  4.0000000000000000

fortbite> det(A)
-2.0000000000000000

fortbite> inv(A)
[2x2 matrix]
  -2.0000000000000000  1.0000000000000000
  1.5000000000000000  -0.50000000000000000

fortbite> eye(3)
[3x3 matrix]
  1.0000000000000000  0.0000000000000000  0.0000000000000000
  0.0000000000000000  1.0000000000000000  0.0000000000000000
  0.0000000000000000  0.0000000000000000  1.0000000000000000

Available Functions

Math Functions

Trigonometric: sin, cos, tan, asin, acos, atan
Hyperbolic: sinh, cosh, tanh
Logarithmic: log, ln, log10, log2
Exponential: exp, exp2, exp10
Rounding: floor, ceil, round
Other: sqrt, abs, factorial

Complex Functions

real or re - real part
imag or im - imaginary part
conj - complex conjugate
arg - phase angle
cabs - complex absolute value

Matrix Functions

zeros(m,n) - zero matrix
ones(m,n) - matrix of ones
eye(n) - identity matrix
det - determinant
inv - inverse
transpose - matrix transpose

Constants

pi - 3.14159...
e - 2.71828...
i - imaginary unit

Operators

Basic: +, -, *, /
Power: ^ or **
Assignment: :=
Precision: ::

Commands

help - show command list
exit or quit - exit the calculator
clear - clear screen
vars - list defined variables

Testing

Run the test suite:

make test

Run specific test categories:

make test-unit        # Unit tests only
make test-integration # Integration tests only

Notes

Calculations use double precision by default
The :: precision operator only affects output formatting, not internal precision
Variable names are case-sensitive
Matrix operations require compatible dimensions

View source

  
        1
        # fortbite
      
        2
        
        3
        A command-line calculator written in Fortran that handles arbitrary precision arithmetic, complex numbers, and matrices.
      
        4
        
        5
        ## Building
      
        6
        
        7
        ```bash
      
        8
        make
      
        9
        ```
      
        10
        
        11
        ## Running
      
        12
        
        13
        ```bash
      
        14
        ./build/bin/fortbite
      
        15
        ```
      
        16
        
        17
        ## Basic Usage
      
        18
        
        19
        ### Arithmetic
      
        20
        ```
      
        21
        fortbite> 2 + 3
      
        22
        5.0000000000000000
      
        23
        
        24
        fortbite> 10 - 4 * 2
      
        25
        2.0000000000000000
      
        26
        
        27
        fortbite> (10 - 4) * 2
      
        28
        12.000000000000000
      
        29
        
        30
        fortbite> 2^8
      
        31
        256.00000000000000
      
        32
        
        33
        fortbite> 27^(1/3)
      
        34
        3.0000000000000000
      
        35
        ```
      
        36
        
        37
        ### Precision Control
      
        38
        
        39
        Specify output precision with `::digits`
      
        40
        ```
      
        41
        fortbite> pi
      
        42
        3.1415926535897931
      
        43
        
        44
        fortbite> pi::10
      
        45
        3.1415926536
      
        46
        
        47
        fortbite> pi::30
      
        48
        3.141592653589793115997963468544
      
        49
        
        50
        fortbite> e::15
      
        51
        2.718281828459045
      
        52
        ```
      
        53
        
        54
        ### Variables
      
        55
        ```
      
        56
        fortbite> x := 42
      
        57
        42.000000000000000
      
        58
        
        59
        fortbite> y := x * 2
      
        60
        84.000000000000000
      
        61
        
        62
        fortbite> x + y
      
        63
        126.00000000000000
      
        64
        ```
      
        65
        
        66
        ### Functions
      
        67
        
        68
        #### Trigonometric
      
        69
        ```
      
        70
        fortbite> sin(pi/2)
      
        71
        1.0000000000000000
      
        72
        
        73
        fortbite> cos(0)
      
        74
        1.0000000000000000
      
        75
        
        76
        fortbite> atan(1) * 4
      
        77
        3.1415926535897931
      
        78
        ```
      
        79
        
        80
        #### Logarithmic and Exponential
      
        81
        ```
      
        82
        fortbite> log(e)
      
        83
        1.0000000000000000
      
        84
        
        85
        fortbite> log10(1000)
      
        86
        3.0000000000000000
      
        87
        
        88
        fortbite> exp(1)
      
        89
        2.7182818284590451
      
        90
        
        91
        fortbite> 2^10
      
        92
        1024.0000000000000
      
        93
        ```
      
        94
        
        95
        #### Special Functions
      
        96
        ```
      
        97
        fortbite> sqrt(2)
      
        98
        1.4142135623730951
      
        99
        
        100
        fortbite> factorial(5)
      
        101
        120.00000000000000
      
        102
        
        103
        fortbite> floor(3.7)
      
        104
        3.0000000000000000
      
        105
        
        106
        fortbite> ceil(3.2)
      
        107
        4.0000000000000000
      
        108
        ```
      
        109
        
        110
        ### Complex Numbers
      
        111
        ```
      
        112
        fortbite> (3 + 4i) * 2
      
        113
        6.0000000000000000+8.0000000000000000i
      
        114
        
        115
        fortbite> abs(3 + 4i)
      
        116
        5.0000000000000000
      
        117
        
        118
        fortbite> conj(3 + 4i)
      
        119
        3.0000000000000000-4.0000000000000000i
      
        120
        ```
      
        121
        
        122
        ### Matrices
      
        123
        ```
      
        124
        fortbite> [1,2;3,4]
      
        125
        [2x2 matrix]
      
        126
          1.0000000000000000  2.0000000000000000
      
        127
          3.0000000000000000  4.0000000000000000
      
        128
        
        129
        fortbite> A := [1,2;3,4]
      
        130
        [2x2 matrix]
      
        131
          1.0000000000000000  2.0000000000000000
      
        132
          3.0000000000000000  4.0000000000000000
      
        133
        
        134
        fortbite> det(A)
      
        135
        -2.0000000000000000
      
        136
        
        137
        fortbite> inv(A)
      
        138
        [2x2 matrix]
      
        139
          -2.0000000000000000  1.0000000000000000
      
        140
          1.5000000000000000  -0.50000000000000000
      
        141
        
        142
        fortbite> eye(3)
      
        143
        [3x3 matrix]
      
        144
          1.0000000000000000  0.0000000000000000  0.0000000000000000
      
        145
          0.0000000000000000  1.0000000000000000  0.0000000000000000
      
        146
          0.0000000000000000  0.0000000000000000  1.0000000000000000
      
        147
        ```
      
        148
        
        149
        ## Available Functions
      
        150
        
        151
        ### Math Functions
      
        152
        - Trigonometric: `sin`, `cos`, `tan`, `asin`, `acos`, `atan`
      
        153
        - Hyperbolic: `sinh`, `cosh`, `tanh`
      
        154
        - Logarithmic: `log`, `ln`, `log10`, `log2`
      
        155
        - Exponential: `exp`, `exp2`, `exp10`
      
        156
        - Rounding: `floor`, `ceil`, `round`
      
        157
        - Other: `sqrt`, `abs`, `factorial`
      
        158
        
        159
        ### Complex Functions
      
        160
        - `real` or `re` - real part
      
        161
        - `imag` or `im` - imaginary part
      
        162
        - `conj` - complex conjugate
      
        163
        - `arg` - phase angle
      
        164
        - `cabs` - complex absolute value
      
        165
        
        166
        ### Matrix Functions
      
        167
        - `zeros(m,n)` - zero matrix
      
        168
        - `ones(m,n)` - matrix of ones
      
        169
        - `eye(n)` - identity matrix
      
        170
        - `det` - determinant
      
        171
        - `inv` - inverse
      
        172
        - `transpose` - matrix transpose
      
        173
        
        174
        ## Constants
      
        175
        - `pi` - 3.14159...
      
        176
        - `e` - 2.71828...
      
        177
        - `i` - imaginary unit
      
        178
        
        179
        ## Operators
      
        180
        - Basic: `+`, `-`, `*`, `/`
      
        181
        - Power: `^` or `**`
      
        182
        - Assignment: `:=`
      
        183
        - Precision: `::`
      
        184
        
        185
        ## Commands
      
        186
        - `help` - show command list
      
        187
        - `exit` or `quit` - exit the calculator
      
        188
        - `clear` - clear screen
      
        189
        - `vars` - list defined variables
      
        190
        
        191
        ## Testing
      
        192
        
        193
        Run the test suite:
      
        194
        ```bash
      
        195
        make test
      
        196
        ```
      
        197
        
        198
        Run specific test categories:
      
        199
        ```bash
      
        200
        make test-unit        # Unit tests only
      
        201
        make test-integration # Integration tests only
      
        202
        ```
      
        203
        
        204
        ## Notes
      
        205
        
        206
        - Calculations use double precision by default
      
        207
        - The `::` precision operator only affects output formatting, not internal precision
      
        208
        - Variable names are case-sensitive
      
        209
        - Matrix operations require compatible dimensions

1	# fortbite
2
3	A command-line calculator written in Fortran that handles arbitrary precision arithmetic, complex numbers, and matrices.
4
5	## Building
6
7	```bash
8	make
9	```
10
11	## Running
12
13	```bash
14	./build/bin/fortbite
15	```
16
17	## Basic Usage
18
19	### Arithmetic
20	```
21	fortbite> 2 + 3
22	5.0000000000000000
23
24	fortbite> 10 - 4 * 2
25	2.0000000000000000
26
27	fortbite> (10 - 4) * 2
28	12.000000000000000
29
30	fortbite> 2^8
31	256.00000000000000
32
33	fortbite> 27^(1/3)
34	3.0000000000000000
35	```
36
37	### Precision Control
38
39	Specify output precision with `::digits`
40	```
41	fortbite> pi
42	3.1415926535897931
43
44	fortbite> pi::10
45	3.1415926536
46
47	fortbite> pi::30
48	3.141592653589793115997963468544
49
50	fortbite> e::15
51	2.718281828459045
52	```
53
54	### Variables
55	```
56	fortbite> x := 42
57	42.000000000000000
58
59	fortbite> y := x * 2
60	84.000000000000000
61
62	fortbite> x + y
63	126.00000000000000
64	```
65
66	### Functions
67
68	#### Trigonometric
69	```
70	fortbite> sin(pi/2)
71	1.0000000000000000
72
73	fortbite> cos(0)
74	1.0000000000000000
75
76	fortbite> atan(1) * 4
77	3.1415926535897931
78	```
79
80	#### Logarithmic and Exponential
81	```
82	fortbite> log(e)
83	1.0000000000000000
84
85	fortbite> log10(1000)
86	3.0000000000000000
87
88	fortbite> exp(1)
89	2.7182818284590451
90
91	fortbite> 2^10
92	1024.0000000000000
93	```
94
95	#### Special Functions
96	```
97	fortbite> sqrt(2)
98	1.4142135623730951
99
100	fortbite> factorial(5)
101	120.00000000000000
102
103	fortbite> floor(3.7)
104	3.0000000000000000
105
106	fortbite> ceil(3.2)
107	4.0000000000000000
108	```
109
110	### Complex Numbers
111	```
112	fortbite> (3 + 4i) * 2
113	6.0000000000000000+8.0000000000000000i
114
115	fortbite> abs(3 + 4i)
116	5.0000000000000000
117
118	fortbite> conj(3 + 4i)
119	3.0000000000000000-4.0000000000000000i
120	```
121
122	### Matrices
123	```
124	fortbite> [1,2;3,4]
125	[2x2 matrix]
126	1.0000000000000000 2.0000000000000000
127	3.0000000000000000 4.0000000000000000
128
129	fortbite> A := [1,2;3,4]
130	[2x2 matrix]
131	1.0000000000000000 2.0000000000000000
132	3.0000000000000000 4.0000000000000000
133
134	fortbite> det(A)
135	-2.0000000000000000
136
137	fortbite> inv(A)
138	[2x2 matrix]
139	-2.0000000000000000 1.0000000000000000
140	1.5000000000000000 -0.50000000000000000
141
142	fortbite> eye(3)
143	[3x3 matrix]
144	1.0000000000000000 0.0000000000000000 0.0000000000000000
145	0.0000000000000000 1.0000000000000000 0.0000000000000000
146	0.0000000000000000 0.0000000000000000 1.0000000000000000
147	```
148
149	## Available Functions
150
151	### Math Functions
152	- Trigonometric: `sin`, `cos`, `tan`, `asin`, `acos`, `atan`
153	- Hyperbolic: `sinh`, `cosh`, `tanh`
154	- Logarithmic: `log`, `ln`, `log10`, `log2`
155	- Exponential: `exp`, `exp2`, `exp10`
156	- Rounding: `floor`, `ceil`, `round`
157	- Other: `sqrt`, `abs`, `factorial`
158
159	### Complex Functions
160	- `real` or `re` - real part
161	- `imag` or `im` - imaginary part
162	- `conj` - complex conjugate
163	- `arg` - phase angle
164	- `cabs` - complex absolute value
165
166	### Matrix Functions
167	- `zeros(m,n)` - zero matrix
168	- `ones(m,n)` - matrix of ones
169	- `eye(n)` - identity matrix
170	- `det` - determinant
171	- `inv` - inverse
172	- `transpose` - matrix transpose
173
174	## Constants
175	- `pi` - 3.14159...
176	- `e` - 2.71828...
177	- `i` - imaginary unit
178
179	## Operators
180	- Basic: `+`, `-`, `*`, `/`
181	- Power: `^` or `**`
182	- Assignment: `:=`
183	- Precision: `::`
184
185	## Commands
186	- `help` - show command list
187	- `exit` or `quit` - exit the calculator
188	- `clear` - clear screen
189	- `vars` - list defined variables
190
191	## Testing
192
193	Run the test suite:
194	```bash
195	make test
196	```
197
198	Run specific test categories:
199	```bash
200	make test-unit # Unit tests only
201	make test-integration # Integration tests only
202	```
203
204	## Notes
205
206	- Calculations use double precision by default
207	- The `::` precision operator only affects output formatting, not internal precision
208	- Variable names are case-sensitive
209	- Matrix operations require compatible dimensions