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Using goto is generally considered bad practice. You should only use them when absolutely necessary.
#include <cstdlib>
#include <iostream>
#include <cmath>
using namespace std;
int main()
{
int WhichFunction;
bool user_quit;
user_quit = false;
Do
{
cout << "What would you like to do ? " << endl << "HINT: 1 = add, 2 = subtract, 3 = multiply, 4 = divide, 5 = Sqr. Root," << endl << "6 = Exponents" << " 99 = Quit" << endl;
cin >> WhichFunction;
switch(WhichFunction){
case 1:
double a;
cout << "Enter the first number: ";
cin >> a;
double b;
cout << "Enter the second number: ";
cin >> b;
double c;
c = a + b;
cout << "Calculating: " << c << endl;
system("PAUSE");
return 0;
break;
case 2:
double aa;
cout << "Enter the first number: ";
cin >> aa;
double bb;
cout << "Enter the second number: ";
cin >> bb;
double cc;
cc = aa - bb;
cout << "Calculating: " << cc << endl;
system("PAUSE");
return 0;
break;
case 3:
double a3;
cout << "Enter the first number: ";
cin >> a3;
double b3;
cout << "Enter the second number: ";
cin >> b3;
double c3;
c3 = a3 * b3;
cout << "Calculating: " << c3 << endl;
system("PAUSE");
return 0;
break;
case 4:
double a4;
cout << "Enter the first number: ";
cin >> a4;
double b4;
cout << "Enter the second number: ";
cin >> b4;
double c4;
c4 = a4 / b4;
if(a4 > 0){
cout << "Calculating: " << c4 << endl;
}
if(b4 > 0){
cout << "Calculating: " << c4 << endl;
}
if(b4 <= 0){
cout << "You Cannot Divide by Zero " << endl;
}
system("PAUSE");
return 0;
break;
case 5:
double a5;
cout << "Enter Your Number: ";
cin >> a5;
double b5;
b5 = sqrt(a5);
cout << "Calculating: " << b5 << endl;
break;
case 6:
double a6,b6;
cout << "Enter your Number: ";
cin >> a6;
cout << "Enter the Exponent: ";
cin >> b6;
double c6;
c6 = pow(a6,b6);
cout << "Calculating: " << c6 << endl;
break;
case 99;
user_quit = true;
break;
default:
cout << "An Error Has Occured, Please try and run the program again. ";
break;
}
} While !user_quit;
system("PAUSE");
return EXIT_SUCCESS;
}
#include <cstdlib>
#include <iostream>
#include <cmath>
using namespace std;
int main()
{
loopA:
int WhichFunction;
bool user_quit;
user_quit = false;
do
{
cout << "What would you like to do ? " << endl << "HINT: 1 = Add, 2 = Subtract, 3 = Multiply, 4 = Divide, 5 = Sqr. Root," << endl << "6 = Exponents, 7 = Pythagorean Theorum, 8 = Sine, 9 = Cosine, 10 = Tangent," << endl << "11 = Circumference, 12 = Area of Circles, 13 = Logarithms, 14 = Area of Squares,15 = Area of Triangles, 16 = Perimeter of Squares, 17 = Absolute Value," << endl << "18 = Volume of Cubes, Rect. Prisms, 19 = Volume of Cylinders," << endl << "20 = Volume of Tri. Prisms, 21 = Round Down, 22 = Round Up, 23 = Cube Root," << endl << "24 = Density, 25 = Volume of Pyramids, 99 = Quit" << endl;
cin >> WhichFunction;
switch(WhichFunction){
case 1:
loop:
int redo;
double a;
cout << "Enter the first number: ";
cin >> a;
double b;
cout << "Enter the second number: ";
cin >> b;
double c;
c = a + b;
cout << "Calculating: " << c << endl;
cout << "Would You Like to Run The Function Again?" << endl << "If YES Type 1, If NO Type 0" << endl;
cin >> redo;
if(redo == 1){
goto loop;
}
if(redo == 0){
system("PAUSE");
return 0;
}
system("PAUSE");
return 0;
break;
case 2:
loop2:
int redo2;
double aa;
cout << "Enter the first number: ";
cin >> aa;
double bb;
cout << "Enter the second number: ";
cin >> bb;
double cc;
cc = aa - bb;
cout << "Calculating: " << cc << endl;
cout << "Would You Like to Run The Function Again?" << endl << "If YES Type 1, If NO Type 0" << endl;
cin >> redo2;
if(redo2 == 1){
goto loop2;
}
if(redo2 == 0){
system("PAUSE");
return 0;
}
system("PAUSE");
return 0;
break;
case 3:
loop3:
int redo3;
double a3;
cout << "Enter the first number: ";
cin >> a3;
double b3;
cout << "Enter the second number: ";
cin >> b3;
double c3;
c3 = a3 * b3;
cout << "Calculating: " << c3 << endl;
cout << "Would You Like to Run The Function Again?" << endl << "If YES Type 1, If NO Type 0" << endl;
cin >> redo3;
if(redo3 == 1){
goto loop3;
}
if(redo3 == 0){
system("PAUSE");
return 0;
}
system("PAUSE");
return 0;
break;
case 4:
loop4:
int redo4;
double a4;
cout << "Enter the first number: ";
cin >> a4;
double b4;
cout << "Enter the second number: ";
cin >> b4;
double c4;
c4 = a4 / b4;
if(b4 > 0){
cout << "Calculating: " << c4 << endl;
}
if(b4 <= 0){
cout << "You Cannot Divide by Zero " << endl;
system("PAUSE");
return 0;
}
cout << "Would You Like to Run The Function Again?" << endl << "If YES Type 1, If NO Type 0" << endl;
cin >> redo4;
if(redo4 == 1){
goto loop4;
}
if(redo4 == 0){
system("PAUSE");
return 0;
}
system("PAUSE");
return 0;
break;
case 5:
loop5:
int redo5;
double a5;
cout << "Enter Your Number: ";
cin >> a5;
double b5;
b5 = sqrt(a5);
cout << "Calculating: " << b5 << endl;
cout << "Would You Like to Run The Function Again?" << endl << "If YES Type 1, If NO Type 0" << endl;
cin >> redo5;
if(redo5 == 1){
goto loop5;
}
if(redo5 == 0){
system("PAUSE");
return 0;
}
system("PAUSE");
return 0;
break;
case 6:
loop6:
int redo6;
double a6,b6;
cout << "Enter your Number: ";
cin >> a6;
cout << "Enter the Exponent: ";
cin >> b6;
double c6;
c6 = pow(a6,b6);
cout << "Calculating: " << c6 << endl;
cout << "Would You Like to Run The Function Again?" << endl << "If YES Type 1, If NO Type 0" << endl;
cin >> redo6;
if(redo6 == 1){
goto loop6;
}
if(redo6 == 0){
system("PAUSE");
return 0;
}
system("PAUSE");
return 0;
break;
case 7:
loop7:
int redo7;
double a7;
double b7;
double c7;
double x7;
cout << "-----------------------" << endl;
cout << " Pythagorean Theorem" << endl;
cout << "-----------------------" << endl;
cout << " ." << endl;
cout << " . . " << endl;
cout << " a . . c" << endl;
cout << " . . "<< endl;
cout << " . ."<< endl;
cout << " ............."<< endl;
cout << " b "<< endl;
cout << endl;
cout << "How to: " << endl;
cout << endl;
cout << "When asked for your missing variable type press '0' and then enter." << endl;
cout << endl;
cout << "Equation: a(sqaured) + b(square) = c(squared)" << endl;
cout << endl;
cout << "Please input your 'a' variable: ";
cin >> a7;
cout << "Please input your 'b' variable: ";
cin >> b7;
cout << "Please input your 'c' variable: ";
cin >> c7;
if (c7 == 0)
{
x7 = (a7*a7) + (b7*b7);
cout << "Your missing length is " << sqrt(x7) << endl;
}
if (a7 == 0)
{
x7 = (c7*c7) - (b7*b7);
cout << "Your missing length is " << sqrt(x7) << endl;
}
if (b7 == 0)
{
x7 = (c7*c7) - (a7*a7);
cout << "Your missing length is " << sqrt(x7) << endl;
}
cout << "Would You Like to Run The Function Again?" << endl << "If YES Type 1, If NO Type 0" << endl;
cin >> redo7;
if(redo7 == 1){
goto loop7;
}
if(redo7 == 0){
system("PAUSE");
return 0;
}
system("PAUSE");
return 0;
break;
case 8:
loop8:
int redo8;
double a8;
cout << "Enter your Number: ";
cin >> a8;
cout << "The sine of your number is: " << sin(a8) << endl;
cout << "Would You Like to Run The Function Again?" << endl << "If YES Type 1, If NO Type 0" << endl;
cin >> redo8;
if(redo8 == 1){
goto loop8;
}
if(redo8 == 0){
system("PAUSE");
return 0;
}
system("PAUSE");
return 0;
break;
case 9:
loop9:
int redo9;
double a9;
cout << "Enter your Number: ";
cin >> a9;
cout << "The Cosine of your Number is: " << cos(a9) << endl;
cout << "Would You Like to Run The Function Again?" << endl << "If YES Type 1, If NO Type 0" << endl;
cin >> redo9;
if(redo9 == 1){
goto loop9;
}
if(redo9 == 0){
system("PAUSE");
return 0;
}
system("PAUSE");
return 0;
break;
case 10:
loop10:
int redo10;
double a10;
cout << "Enter Your Number: ";
cin >> a10;
cout << "The Tangent of your Number is: " << tan(a10) << endl;
cout << "Would You Like to Run The Function Again?" << endl << "If YES Type 1, If NO Type 0" << endl;
cin >> redo10;
if(redo10 == 1){
goto loop10;
}
if(redo10 == 0){
system("PAUSE");
return 0;
}
system("PAUSE");
return 0;
break;
case 11:
loop11:
int redo11;
double diameter;
cout << "Enter Your Diameter: ";
cin >> diameter;
double circumference;
circumference = diameter * 3.14;
cout << "The circumference of your circle is: " << circumference << endl;
cout << "Would You Like to Run The Function Again?" << endl << "If YES Type 1, If NO Type 0" << endl;
cin >> redo11;
if(redo11 == 1){
goto loop11;
}
if(redo11 == 0){
system("PAUSE");
return 0;
}
break;
case 12:
loop12:
int redo12;
double radius;
cout << "Enter Your Radius: ";
cin >> radius;
double area;
area = 3.14 * pow(radius,2);
cout << "Your Area Is: " << area << endl;
cout << "Would You Like to Run The Function Again?" << endl << "If YES Type 1, If NO Type 0" << endl;
cin >> redo12;
if(redo12 == 1){
goto loop12;
}
if(redo12 == 0){
system("PAUSE");
return 0;
}
break;
case 13:
loop13:
int redo13;
double a13;
cout << "Enter your Number: ";
cin >> a13;
double b13;
b13 = log(a13);
cout << "Calculating: " << b13 << endl;
cout << "Would You Like to Run The Function Again?" << endl << "If YES Type 1, If NO Type 0" << endl;
cin >> redo13;
if(redo13 == 1){
goto loop13;
}
if(redo13 == 0){
system("PAUSE");
return 0;
}
break;
case 14:
loop14:
int redo14;
double base;
double height;
double area2;
cout << "Enter the Base: ";
cin >> base;
cout << "Enter the Height: ";
cin >> height;
area = base * height;
cout << "Calculating: " << area << endl;
cout << "Would You Like to Run The Function Again?" << endl << "If YES Type 1, If NO Type 0" << endl;
cin >> redo14;
if(redo14 == 1){
goto loop14;
}
if(redo14 == 0){
system("PAUSE");
return 0;
}
break;
case 15:
loop15:
int redo15;
double base2;
double height2;
double area3;
cout << "Enter the Base: ";
cin >> base2;
cout << "Enter the Height: ";
cin >> height2;
area3 = (base2 * height2) / 2;
cout << "Calculating: " << area3 << endl;
cout << "Would You Like to Run The Function Again?" << endl << "If YES Type 1, If NO Type 0" << endl;
cin >> redo15;
if(redo15 == 1){
goto loop15;
}
if(redo15 == 0){
system("PAUSE");
return 0;
}
break;
case 16:
loop16:
int redo16;
double side1;
double side2;
double side3;
double side4;
double perimeter;
cout << "Enter the length of your first side: ";
cin >> side1;
cout << "Enter the length of your second side: ";
cin >> side2;
cout << "Enter the length of your third side: ";
cin >> side3;
cout << "Enter the length of your fourth side: ";
cin >> side4;
perimeter = side1 + side2 + side3 + side4;
cout << "Calculating: " << perimeter << endl;
cout << "Would You Like to Run The Function Again?" << endl << "If YES Type 1, If NO Type 0" << endl;
cin >> redo16;
if(redo16 == 1){
goto loop16;
}
if(redo16 == 0){
system("PAUSE");
return 0;
}
break;
case 17:
loop17:
int redo17;
double a17;
double b17;
cout << "Enter Your Number: ";
cin >> a17;
b17 = fabs(a17);
cout << "Calculating: " << b17 << endl;
cout << "Would You Like to Run The Function Again?" << endl << "If YES Type 1, If NO Type 0" << endl;
cin >> redo17;
if(redo17 == 1){
goto loop17;
}
if(redo17 == 0){
system("PAUSE");
return 0;
}
break;
case 18:
loop18:
int redo18;
double base3;
double width;
double height3;
double volume;
cout << "Enter Your Base: ";
cin >> base3;
cout << "Enter Your Width: ";
cin >> width;
cout << "Enter Your Height: ";
cin >> height3;
volume = base3 * width * height3;
cout << "Calculating: " << volume << endl;
cout << "Would You Like to Run The Function Again?" << endl << "If YES Type 1, If NO Type 0" << endl;
cin >> redo18;
if(redo18 == 1){
goto loop18;
}
if(redo18 == 0){
system("PAUSE");
return 0;
}
break;
case 19:
loop19:
int redo19;
double radius2;
double area4;
double height4;
double volume2;
cout << "Enter Your Radius: ";
cin >> radius2;
area4 = pow(radius2,2);
cout << "Enter your Height: ";
cin >> height4;
volume = area4 * height4;
cout << "Calculating: " << volume2 << endl;
cout << "Would You Like to Run The Function Again?" << endl << "If YES Type 1, If NO Type 0" << endl;
cin >> redo19;
if(redo19 == 1){
goto loop19;
}
if(redo19 == 0){
system("PAUSE");
return 0;
}
break;
case 20:
loop20:
int redo20;
double base4;
double height5;
double height6;
double area5;
double volume3;
cout << "Enter Your Base: ";
cin >> base4;
cout << "Enter Your Height: ";
cin >> height5;
area5 = base4 * height5;
cout << "Enter Your Second Height: ";
cin >> height6;
volume3 = height6 * area5;
cout << "Calculating: " << volume3 << endl;
cout << "Would You Like to Run The Function Again?" << endl << "If YES Type 1, If NO Type 0" << endl;
cin >> redo11;
if(redo20 == 1){
goto loop20;
}
if(redo20 == 0){
system("PAUSE");
return 0;
}
break;
case 21:
loop21:
int redo21;
double a21;
double b21;
cout << "Enter Your Number: ";
cin >> a21;
b21 = floor(a21);
cout << "Calculating: " << b21 << endl;
cout << "Would You Like to Run The Function Again?" << endl << "If YES Type 1, If NO Type 0" << endl;
cin >> redo21;
if(redo21 == 1){
goto loop21;
}
if(redo21 == 0){
system("PAUSE");
return 0;
}
break;
case 22:
loop22:
int redo22;
double a22;
double b22;
cout << "Enter Your Number: ";
cin >> a22;
b22 = ceil(a22);
cout << "Calculating: " << b22 << endl;
cout << "Would You Like to Run The Function Again?" << endl << "If YES Type 1, If NO Type 0" << endl;
cin >> redo22;
if(redo22 == 1){
goto loop22;
}
if(redo22 == 0){
system("PAUSE");
return 0;
}
break;
case 23:
loop23:
int redo23;
double val;
cout << "Enter Your Number: ";
if (cin >> val){
cout << "Cube Root of " << val << ": " << pow(abs(val), 1.0 / 3.0) << endl;
}
cout << "Would You Like to Run The Function Again?" << endl << "If YES Type 1, If NO Type 0" << endl;
cin >> redo23;
if(redo23 == 1){
goto loop23;
}
if(redo23 == 0){
system("PAUSE");
return 0;
}
break;
case 24:
loop24:
int redo24;
double mass;
double volume4;
double density;
cout << "Enter The Mass of Your Object: ";
cin >> mass;
cout << "Enter The Volume of Your Object: ";
cin >> volume4;
density = mass / volume4;
cout << "Calculating: " << density << " g/cm3, g/ml " << endl;
cout << "Would You Like to Run The Function Again?" << endl << "If YES Type 1, If NO Type 0" << endl;
cin >> redo24;
if(redo24 == 1){
goto loop24;
}
if(redo24 == 0){
system("PAUSE");
return 0;
}
break;
case 25:
loop25:
int redo25;
double width25;
double height25;
double height25b;
double volume25;
cout << "Enter The Width of the Base: ";
cin >> width25;
cout << "Enter The Height of the Base: ";
cin >> height25;
cout << "Enter The Height of The Pyramid: ";
cin >> height25b;
volume25 = ((width25 * height25) *height25b) / 2;
cout << "Calculating: " << volume25 << endl;
cout << "Would You Like to Run The Function Again?" << endl << "If YES Type 1, If NO Type 0" << endl;
cin >> redo25;
if(redo25 == 1){
goto loop25;
}
if(redo25 == 0){
system("PAUSE");
return 0;
}
case 99:
user_quit = true;
break;
default:
int RedoDefault;
cout << "An Error Has Occured, Please try and run the program again. " << endl;
cout << "Go To The Beginning? YES = 1, NO = 0" << endl;
cin >> RedoDefault;
if(RedoDefault == 1){
goto loopA;
}
if(RedoDefault == 0){
system("PAUSE");
return 0;
}
break;
}
} while (!user_quit);
system("PAUSE");
return 0;
}
if(peek("argument") = 3) then
leftOperand = val(peek$("argument"))
operator$ = peek$("argument")
rightOperand = val(peek$("argument"))
else
print "You must enter exactly three arguments"
exit
endif
switch operator$
case "*":
print leftOperand * rightOperand
break
case "+":
print leftOperand + rightOperand
break
case "/":
print leftOperand / rightOperand
break
case "-":
print leftOperand - rightOperand
break
default:
print "Invalid operator; valid operators are: -, +, / and *"
end switch
commcalc `commcalc 9 '*' 4` "-" `commcalc 8 '/' 7`
commcalc `ls -Al |wc -l` '-' `ls -l|wc -l`
echo 1000000 >onefile
echo 999999 >twofile
commcalc `cat onefile` '-' `cat twofile`