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
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
|
// SwitchCalculator - use the switch state ment to implement a calculator
#include <cstdio>
#include <cstdlib>
#include <iostream>
using namespace std;
void op1(int nOperand1, int nOperand2, char cOperator,int nOperand3,char cOperator2)
{
int result;
switch (cOperator)
{
case '+':
result = nOperand1 + nOperand2;
break;
case '-':
result = nOperand1 - nOperand2;
break;
case '*':
case 'x':
case 'X':
result = nOperand1 * nOperand2;
break;
case '/':
result = nOperand1 / nOperand2;
break;
case '%':
result = nOperand1 % nOperand2;
break;
default:
cout << " is not understood";
}
switch (cOperator2)
{
case '+':
result = result + nOperand3;
break;
case '-':
result = result - nOperand3;
break;
case '*':
case 'x':
case 'X':
result = result * nOperand3;
break;
case '/':
result = result / nOperand3;
break;
case '%':
result = result % nOperand3;
break;
default:
cout << " is not understood";
}
cout << result << endl;
}
void op2(int nOperand2, int nOperand3, char cOperator2,int nOperand1,char cOperator)
{
int result;
switch (cOperator2)
{
case '+':
result = nOperand2 + nOperand3;
break;
case '-':
result = nOperand2 - nOperand3;
break;
case '*':
case 'x':
case 'X':
result = nOperand2 * nOperand3;
break;
case '/':
result = nOperand2 / nOperand3;
break;
case '%':
result = nOperand2 % nOperand3;
break;
default:
cout << " is not understood";
}
switch (cOperator)
{
case '+':
result = result + nOperand1;
break;
case '-':
result = result - nOperand1;
break;
case '*':
case 'x':
case 'X':
result = result * nOperand1;
break;
case '/':
result = result / nOperand1;
break;
case '%':
result = result % nOperand1;
break;
default:
cout << " is not understood";
}
cout << result << endl;
}
int main(int nNumberofArgs, char* pszArgs[])
{
int nOperand1;
int nOperand2;
int nOperand3;
char cOperator;
char cOperator2;
cout << "Enter 'value1 op value2 op2 value3'\n"
<< "where op is +, -, *, / or %:" << endl;
cin >> nOperand1 >> cOperator >> nOperand2 >> cOperator2 >> nOperand3;
cout << nOperand1 << " "
<< cOperator << " "
<< nOperand2 << " "
<< cOperator2 << " "
<< nOperand3 << " = ";
if(cOperator == '*' || cOperator == '/')
{
op1(nOperand1,nOperand2,cOperator,nOperand3,cOperator2);
}
else
{
op2(nOperand2,nOperand3,cOperator2,nOperand1,cOperator);
}
cout << endl;
system("PAUSE");
return 0;
}
|
