blob: 5999571b13a88db534294e4cad0fc059cdab4718 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
|
#include <iostream>
#include <string>
#include <cmath>
// github.com/jstmaxlol/escape.ANSI.sux
#include "escape.ansi.h"
int calculate(double& n1, char& op, double& n2);
void usage();
int main(int argc, char** argv) {
if (argc > 4) {
std::cerr << "::> " << red << "xsc.Error" << def << "/" << red << "too_many_arguments " << def;
return -1;
}
if (argc < 2) {
std::cerr << "::> " << red << "xsc.Error" << def << "/" << red << "not_enough_arguments " << def;
return -1;
}
std::string arg1 = argv[1];
// help
if (arg1 == "help" || arg1 == "h") {
usage();
return 0;
}
if (arg1 == "--help" || arg1 == "-h") {
std::cerr << "::> " << red << "xsc.Warning" << def << "/" << red << "non_existing_argument\n"
<< def << "::> did you mean: " << yellow << "h " << def << "||" << yellow << "help" << def << "?\n";
usage();
return -1;
}
// square root: xsc <num> r
if (argc == 3) {
double n1;
try {
n1 = std::stod(arg1);
} catch (...) {
std::cerr << "::> " << red << "xsc.Error" << def << "/" << red << "invalid_number " << def;
return -1;
}
std::string opstr = argv[2];
if (opstr == "r") {
std::cout << sqrt(n1) << std::endl;
return 0;
} else {
std::cerr << "::> " << red << "xsc.Error" << def << "/" << red << "invalid_operator " << def;
return -1;
}
}
// normal operation: xsc <num1> <op> <num2>
if (argc == 4) {
double n1, n2;
char op;
try {
n1 = std::stod(arg1);
n2 = std::stod(argv[3]);
} catch (...) {
std::cerr << "::> " << red << "xsc.Error" << def << "/" << red << "invalid_number " << def;
return -1;
}
op = argv[2][0];
return calculate(n1, op, n2);
}
// if only 1 argument and not help
std::cerr << "::> " << red << "xsc.Error" << def << "/" << red << "not_enough_arguments " << def;
return -1;
}
int calculate(double& n1, char& op, double& n2) {
switch (op) {
case '+':
std::cout << n1 + n2;
return 0;
case '-':
std::cout << n1 - n2;
return 0;
case '/':
if (n2 == 0) {
std::cerr << "::> " << red << "xsc.MathError" << def << "/" << red << "divsion_by_zero";
return -1;
}
std::cout << n1 / n2;
return 0;
case '%':
std::cout << (n1 / n2) * 100;
return 0;
case '^':
std::cout << pow(n1, n2);
return 0;
}
return -1;
}
void usage() {
// Prints usage message (help)
system("figlet XSC | lolcat");
std::cout
<< "[ eXtremelySimpleCalculator usage screen ]\n\n"
<< "'xsc help / h' | print usage screen (this one!)\n"
<< "'xsc <num1> <(+|-|x|/|%|^)> <num2>' | outputs expression's result\n"
<< "'xsc <num1> r' | outputs the square root of num1\n"
;
}
|
