CodePudding user response:

CodePudding user response:

CodePudding user response:

CodePudding user response:

/* -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
Functional calculator (vc + + 6.0, the Win32 Console) 
Function: 
Currently provides more than 10 common mathematical functions: 
(1) sinusoidal sin 
2 cosine cos 
(3) tangent tan 
(4) open square SQRT 
5] arcsine arcsin 
[6] the arccosine arccos 
Once the arctangent arctan 
Being common logarithm lg 
'levies natural logarithm ln 
Exp. ⑽ e index 
⑾ been function ^ 
⑿ rounded up ceil 
[13] the whole floor down 
[14] round round round 
Usage: 
If asked 32 times the power of 2, can break into 2 ^ 32 & lt; Enter & gt; 
If asked 30 degrees of tangent type tan (Pi/6) & lt; Enter & gt; 
Note not scored: tan (30) & lt; Enter> 
If required 1.23 radians sine, there are several approaches are effective: 
Sin (1.23) & lt; Enter> 
Sin 1.23 & lt; Enter> 
Sin1.23 & lt; Enter> 
If verification is cosine formula of sum of squares can be into sin (1.23) ^ 2 + cos (1.23) ^ 2 & lt; Enter> Or sin1.23 ^ 2 + cos1.23 ^ 2 & lt; Enter> 
In addition two function together, automatic understanding for multiplication, such as: sin1.23 cos0.77 + cos1.23 sin0.77 is equivalent to the sin (1.23) * cos (0.77) + cos (1.23) * sin (0.77) 
Of course, you can also be based on the triangle transform, reoccupy sin (1.23 + 0.77) or sin2 verify, 
This calculator so give full consideration to the operator priority, such as: 2 + 3 * 4 ^ 2 effectively: 2 + (3) * (4 * 4) 
In addition the function name if it is in front of the Numbers, then automatically think people. 
Likewise, if a number is the right of the left parenthesis, automatically think that the number and implied a multiplication sign between a bracket, 
Such as: 3 sin1. 2 ^ 2 + 5 cos2. 1 ^ 2 to 3 * sin2 + 5 * cos2 (1.2) (2.1) 
Such as: 4 (3-2 (sqrt5-1) + ln2) + lg5 equivalent to 4 * (2 * 3-5 () - 1) + loge (2)) + log10 (5) 
In addition, the calculator provides a Pi type letters case-insensitive, for ease of use, 
Hexadecimal integer begin with 0 x or 0 x, 
-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- */
# include & lt; Iostream> 
# include & lt; Iomanip> 
# include & lt; Cstdlib> 
# include & lt; Cstring> 
# include & lt; Cctype> 
# include & lt; Cmath> 
# include & lt; stdio.h> 
# include & lt; String. H> 
# include & lt; Windows. H> 
using namespace std; 
Const char Tab=0 x9; 
Const int DIGIT=1; 
Const int MAXLEN=16384; 
Char s [MAXLEN], * endss; 
Int PCS=15; 
Double round (double dVal, short iPlaces) {//iPlaces>=0 
Char s [30]; 
Double dRetval; 

Sprintf (s, "%. * lf iPlaces, dVal); 
Sscanf (s, "% lf", & amp; DRetval); 
Return (dRetval); 
} 
Double fun (double x, char op [], int * iop) {
While (op iop [* 1] <32)//the bank make function calls without nested parentheses, such as arc sin (sin (1.234)) simply type arc sin sin 1.234 & lt; Enter> 
The switch (op iop [* 1]) {
Case 7: x=sin (x); (* iop) -; break; 
Case 8: x=cos (x); (* iop) -; break; 
Case 9: x=tan (x); (* iop) -; break; 
Case 10: x=SQRT (x); (* iop) -; break; 
Case 11: x=asin (x); (* iop) -; break; 
Case 12: x=a cosine (x); (* iop) -; break; 
Case 13: x=atan (x); (* iop) -; break; 
Case 14: x=log10 (x); (* iop) -; break; 
Case: 15 x=log (x); (* iop) -; break; 
Case: 16 x=exp (x); (* iop) -; break; 
Case 17: x=ceil (x); (* iop) -; break; 
Case: 18 x=floor (x); (* iop) -; break; 
Case: 19 x=round (x, 0); (* iop) -; break; 
} 
return x; 
} 
Double calc (char * expr, char * * addr) {
Static int deep;//the recursion depth 
Static char * fname []={" sin ", "cos", "tan", "SQRT", "arcsin", "arccos", "arctan", "lg", "ln", "exp", "ceil", "floor", "round", NULL}; 
Double ST [10]={0.0};//digital stack 
Char op [10]={' + '};//operator stack 
Rexp char c, * and * pp, * pf; 
Int ist=1, iop=1, the last, I, n. 
__int64 i64; 

if (! Deep) {
Pp=pf=expr; 
Do {
C=* pp++; 
If (c!=' '& amp; & C!!!=Tab) 
* pf++=c; 
} while (c!='\ 0'); 
} 
Pp=expr; 
If (c=* (pp)=='-' | | c=='+') {
Op [0]=c; 
Pp++; 
} 
The last=! DIGIT; 
While (pp (c=*)!='\ 0') {
If (c=='(') {//left round brackets 
Deep++; 
ST [ist++]=calc (+ + pp, addr); 
Deep -; 
ST] [ist - 1=fun (ST] [ist - 1, op, & amp; Iop); 
Pp=* addr. 
The last DIGIT of=; 
If (* pp=='(' | | isalpha pp (*) & amp; & Strnicmp (pp, "Pi", 2)) {//purpose is: when the right round bracket is extremely right to left round bracket or function name, the default for the multiplication 
Op [iop++]='*'; 
The last=! DIGIT; 
C=op [-- iop]; 
Goto operate; 
} 
} 
Else if (c==') ') {//right round brackets 
Pp++; 
break; 
{} else if (isalpha (c)) 
if (! Strnicmp (pp, "Pi", 2)) {
If (last==DIGIT) {
cout<"PI on the left side of the encounter)" & lt; } 
ST [ist++]=3.14159265358979323846264338328; 
ST] [ist - 1=fun (ST] [ist - 1, op, & amp; Iop); 
Pp +=2; 
The last DIGIT of=; 
if (! Strnicmp (pp, "Pi", 2)) {
cout<"Connected to two PI" & lt; } 
If (* pp=='(') {
cout<"PI right encounter (" & lt; } 
} else {
For (I=0; (pf=fname [I])!=NULL; I++) 
if (! Strnicmp (pp, pf, strlen (pf))) break; 
If (pf!=NULL) {
Op [iop++]=7 + I; 
Pp +=strlen (pf); 
} else {
cout<"Strange function name" & lt; } 
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