#include<graphics.h> #include<conio.h> #include<iostream.h> #include<dos.h> #include<ctype.h> void oput(char &ch2, char ch1) { ch2++; if(ch2>=ch1) ch2=ch1; } void thankyou() { clrscr(); char a='A',m='A',e='A',y='A',w='A',g='A',l='A',s='A',h='A',u='A'; char t='A',o='A',d='A',n='A',j='A',r='A',p='A',v='A'; char i='A',k='A',c='A'; for(int j1=0;j1<26;j1++) { clrscr(); cout<<"\n\n\t\t\t\tTHANK YOU"; cout<<"\n\n\n\t\t\t"; cout<<"\t"; cout<<"\n\n\t\t\t\t"<<s<<a<<v<<y<<a<<" "<<s<<a<<c<<h<<i<<" "<<g<<u<<p<<t<<a; delay(100); oput(s,'S'); oput(a,'A'); oput(v,'V'); oput(y,'Y'); oput(a,'A'); oput(s,'S'); oput(a,'A'); oput(c,'C'); oput(h,'H'); oput(i,'I'); oput(g,'G'); oput(u,'U'); oput(p,'P'); oput(t,'T'); oput(a,'A'); } delay(250); cout<<"\n\n\n\n\t\t\t Press any Key To Navigate" ; cout<<"\n\n\n\t\t\t away from this page "; getch(); clrscr(); } float r,d,D,kt,syp,smax,sn,m; long double fos; float ans[5]; int i=0; char ch='y'; //Definition of alpha(). void alpha(char a) 	{ 	 cout<<a<<" "; 	 delay(120); //Delays for 200 milli-seconds. 	} //Definition of welcomescreen(). void welcomescreen() 	{ clrscr(); 		cout<<"\n\n\n\n\n\n\n\n\n\t\t "; 		alpha('S'); 		alpha('T'); 		alpha('R'); 		alpha('E'); 		alpha('S'); 		alpha('S'); 		alpha('E'); 		alpha('S'); 		cout<<" "; 		alpha('A'); 		alpha('N'); 		alpha('D'); 		cout<<" "; 		alpha('S'); 		alpha('T'); 		alpha('R'); 		alpha('A'); 		alpha('I'); 		alpha('N'); 		alpha('S'); 		cout<<"\n\t\t -------------------------------------"; 	 cout<<"\n\n\t\t \"PROBLEM SOLVING USING C++\""; 	 delay(2000); 	 clrscr(); 	} //Function to create the shapes that the user will select int shape() { int choice; int gd = DETECT, gm; initgraph(&gd, &gm, "C:\\TC\\BGI"); cout<<"\t\t\t Choose The Type Of Section :"; cout<<"\n\n\n\n\t\t 1\t\t\t\t 2"; cout<<"\n\n\n\n\n\n\n\n\n\t\t 3\t\t\t 4"; cout<<"\n\n\n\n\n\n\n\n\n\t\t 5\t\t\t\t 6"; cout<<"\n\n\n\n\n\n\t\t\t Enter Your Choice : "; //Figure 1 code begins line(100, 120, 200, 120); line(100, 20, 200, 20); line(100, 20, 100, 120); arc(230, 20, 180, 270, 30); arc(230, 120, 90, 180, 30); line(230, 90, 270, 90); line(230, 50, 270, 50); line(270, 50, 270, 90); //Figure 2 code begins line(360, 120, 420, 120); line(360, 20, 420, 20); line(360, 20, 360, 120); arc(435, 20, 180, 0, 15); arc(435, 120, 0, 180, 15); line(450, 20, 510, 20); line(450, 120, 510, 120); line(510, 20, 510, 120); //Figure 3 code begins rectangle(100, 160, 270, 260); circle(185, 210, 20); //Figure 4 code Begins line(360, 160, 420, 160); line(360, 270, 420, 270); line(420, 270, 420, 160); arc(435, 160, 180, 0, 15); arc(435, 270, 0, 180, 15); line(450, 270, 510, 270); line(450, 160, 510, 160); line(450, 270, 450, 160); arc(450, 215, 317.4896, 42.5104, 81.394); arc(420, 215, 137.4896, 222.5104, 81.394); //Figure 5 code Begins arc(230, 310, 180, 270, 30); arc(230, 420, 90, 180, 30); line(100, 310, 200, 310); line(100, 420, 200, 420); line(200, 310, 200, 420); arc(200, 365, 151.1893,208.8107,114.1271); arc(200, 365, 340.347, 19.653, 74.330); line(230, 340, 270, 340); line(230, 390, 270, 390); //Figure 6 code Begins arc(360, 365, 339.8637, 20.1363, 159.7654); arc(510, 365, 159.8637, 200.1363, 159.7654); line(360, 310, 510, 310); line(360, 420, 510, 420); circle(435, 365, 20); cin>>choice; closegraph(); return choice; } void getdata() { clrscr(); cout<<"\n\t\t\t\t Please Enter Data :\n"; cout<<"\n \'r\' Value (mm) : "; cin>>r; cout<<"\n \'d\' Value (mm) : "; cin>>d; cout<<"\n \'D\' Value (mm) : "; cin>>D; cout<<"\n Factor Of Saftey : "; cin>>fos; cout<<"\n\n r/d Value is : "<<r/d; cout<<"\n\n D/d Value is : "<<D/d; cout<<"\n\n REFER Design Data Handbook Pg. 31 to Pg.38 for value of Kt..."; cout<<"\n\n Kt Value is : "; cin>>kt; cout<<"\n\nEnter The Value of BENDING MOMENT (in kN-mm) : "; cin>>m; sn=((1000*m*32*7)/(22*d*d*d)); smax=kt*sn; ans[i]=smax; i++; cout<<"\n Nominal Stress : (Mx32)/(pixd^3) : "<<sn<<" Mpa"; cout<<"\n Maximum Stress : KtxNominal Stress : "<<smax<<" Mpa"; getch(); } void finalans() { float max=ans[0]; for(int l=1; l<i; l++) { if(ans[l]>max) max=ans[l]; } cout<<"\n\n\n\n\n\t\t\t Considering the HIGHER value..."; cout<<"\n\n\t\t\t MAXIMUM STRESS IS : "<<max<<" Mpa"; cout<<"\n\n\t\t\t Since Factor of Safety ="<<fos; cout<<"\n\n\t\t\t Yield Stress = FOS x Max. Stress"; cout<<"\n\n\t\t\t = "<<fos<<" x "<<max; cout<<"\n\n\t\t\t		 = "<<fos*max<<" Mpa"; cout<<"\n REFER Design Data Handbook Pg.427 to Pg.429 to select material."; } float mmax,su,mmin,smax1,smin1,sa,sm,ktf,sen; char material; void bmcalc() { cout<<"\n\nEnter Magnitude of Bending Moment : "; cin>>m; cout<<"\nThus, \t Mmax = +"<<m<<" kN-mm"; cout<<"\n \t Mmin = -"<<m<<" kN-mm"; d=28; smax1=((1000*m*32*7)/(22*d*d*d)); smin1=smax1; sa=(smax1+smin1)/2; sm=(smax1-smin1)/2; cout<<"\n\nMax. Stress = +"<<smax1; cout<<"\nMin. Stress = -"<<smin1; cout<<"\n\nAmplitude Stress = (Max - Min)/2 = "<<sa; cout<<"\n\nMean Stress = (Max + Min)/2 = "<<sm; cout<<"\n\nAssuming The Material To Be Highly Sensitive,\nWe consider q=1"; ktf=kt; cout<<"\n\nKtf = q(Kt-1)+1 = "<<ktf; cout<<"\nFor Endurance Stress :"; cout<<"\n 0.5 x Ultimate Stress\tFOR STEELS"; cout<<"\n 0.4 x Ultimate Stress\tFOR CAST IRON"; cout<<"\nEnter Ultimate Stress (Mpa) : "; cin>>su; cout<<"\nEnter Type Of Material : (S/I) : "; cin>>material; tolower(material); if(material=='s') { sen=0.5*su; } else { sen=0.4*su; } cout<<"\n\n\t\t\t Using SODERBERGS EQUATION : "; cout<<"\nA=1\tFor Reversed Bending Moment"; cout<<"\nB=0.85 For All Cases"; cout<<"\nC=0.80 Depending on the Material"; float var1=((kt*sa)/(0.68*sen)); fos=1/var1; cout<<"\n\nThus, FACTOR OF SAFETY = "<<fos; if(fos<2) cout<<"\nWhich is NOT suitable..."; else cout<<"\nWhich is Suitable..."; getch(); } //Main function that drives the entire program. You may also increase the waiting time at multiple points in the program as per requirement void main() { clrscr(); int flag=1; welcomescreen(); while(ch=='y') { while(flag) { int choice=shape(); switch(choice) { case 4: case 5: flag=0; 	 break; default: cout<<"\n\n\n\n\t\t\t INVALID CHOICE. Try Again."; 	 getch(); 	 break; } } getdata(); cout<<"\n\nDo You Want To Enter Data For Another Section? (Y/N) : "; cin>>ch; tolower(ch); if(ch=='y') flag=1; } finalans(); getch(); char b; clrscr(); cout<<"\n Do you want to check if Bending Moment is Reversed? (Y/N) : "; cin>>b; tolower(b); if(b=='y') { bmcalc(); } thankyou(); getch(); }

C++ Online Compiler

Write, Run & Share C++ code online using OneCompiler's C++ online compiler for free. It's one of the robust, feature-rich online compilers for C++ language, running on the latest version 17. Getting started with the OneCompiler's C++ compiler is simple and pretty fast. The editor shows sample boilerplate code when you choose language as C++ and start coding!

Read inputs from stdin

OneCompiler's C++ online compiler supports stdin and users can give inputs to programs using the STDIN textbox under the I/O tab. Following is a sample program which takes name as input and print your name with hello.

#include <iostream>
#include <string>
using namespace std;

int main() 
{
    string name;
    cout << "Enter name:";
    getline (cin, name);
    cout << "Hello " << name;
    return 0;
}

About C++

C++ is a widely used middle-level programming language.

  • Supports different platforms like Windows, various Linux flavours, MacOS etc
  • C++ supports OOPS concepts like Inheritance, Polymorphism, Encapsulation and Abstraction.
  • Case-sensitive
  • C++ is a compiler based language
  • C++ supports structured programming language
  • C++ provides alot of inbuilt functions and also supports dynamic memory allocation.
  • Like C, C++ also allows you to play with memory using Pointers.

Syntax help

Loops

1. If-Else:

When ever you want to perform a set of operations based on a condition If-Else is used.

if(conditional-expression) {
   //code
}
else {
   //code
}

You can also use if-else for nested Ifs and If-Else-If ladder when multiple conditions are to be performed on a single variable.

2. Switch:

Switch is an alternative to If-Else-If ladder.

switch(conditional-expression){    
case value1:    
 // code    
 break;  // optional  
case value2:    
 // code    
 break;  // optional  
......    
    
default:     
 code to be executed when all the above cases are not matched;    
}

3. For:

For loop is used to iterate a set of statements based on a condition.

for(Initialization; Condition; Increment/decrement){  
  //code  
}

4. While:

While is also used to iterate a set of statements based on a condition. Usually while is preferred when number of iterations are not known in advance.

while (condition) {  
// code 
}

5. Do-While:

Do-while is also used to iterate a set of statements based on a condition. It is mostly used when you need to execute the statements atleast once.

do {  
 // code 
} while (condition);

Functions

Function is a sub-routine which contains set of statements. Usually functions are written when multiple calls are required to same set of statements which increases re-usuability and modularity. Function gets run only when it is called.

How to declare a Function:

return_type function_name(parameters);

How to call a Function:

function_name (parameters)

How to define a Function:

return_type function_name(parameters) {  
 // code
}