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 what is c language?

Ans.
The C programming language is a computer programming language  developed to do system programming for the operating system UNIX .
 People can write their programs as a series of step-by-step instructions makes C a procedural language and it is an imperative language too.
The main features of C language include low-level access to memory, a simple set of keywords, and clean style, these features  make C language suitable for system programmings like an operating system or compiler development. Many later languages have borrowed syntax/features  directly or indirectly from C language. Important of C and its applications :- C is highly portable and is used for scripting system applications which form a major part of Windows, UNIX, and Linux operating system. C is a general-purpose programming language and can efficiently work on enterprise applications, games, graphics, and applications requiring calculations, etc.

Program print table using recursion function in c/c++.

#include<stdio.h>
#include<conio.h>
void fact(int n,int m);
void main()
{
int n,f;
clrscr();
printf("enter any number");
scanf("%d",&n);
fact(n,1);
getch();
}
void fact(int n,int m)
{
printf("\n%d",n*m);
if(m==10)
return;
m++;
fact(n,m);
}

Print a to z using recursive function c 

#include<stdio.h>

#include<conio.h>

void abc(char);

void main ()

{

        clrscr();

        abc('a');

        getch();

}

void abc (char a)

{

        printf("\t%c",a);

        if (a=='z')

        return;

        a++;

        abc(a);

}

Print z to a using recursive function c

#include<stdio.h>

#include<conio.h>

void abc (char);

void main()

{

        clrscr();

        abc('z');

        getch();

}

void abc (char a)

{

        printf("\t%c",a);

        if(a=='a')

        return;

        a--;

        abc(a);

}

This is Quiz Game Project in c/c++ , this is developed by Tech JCC Mahilpur

#include<stdio.h>

#include<conio.h>

#include<stdlib.h>

void main()

{

int i,j,k=0,cs1=0,sc=0,cs2=0,cs3=0;

clrscr();

char c;

printf("\n\n*********WELCOME TO THIS QUIZ GAME********");

do

{

printf("\n1.SPORTS");

printf("\n2.POLITICS");

printf("\n3.GENERAL KNOWLEDGE");

printf("\n4.EXIT\n");

scanf("%d",&i);

switch(i)

{

case 1:

cs1++;

if(cs1==1)

{

sc+=10;

printf("\n(a)which is the national game of india?");

printf("\noptions\n1.cricket\n2.football\n3.hockey");

scanf("%d",&j);

if(j==3)

{

printf("\ncorrect");

k+=10;

}

else

printf("\nwrong");

}

if(cs1==2)

{

sc+=10;

printf("\n(b)who is the captain of indian football team?");

printf("\n1.sunil shetri\n2.ronaldo\n3.messi");

scanf("%d",&j);

if(j==1)

{

printf("\ncorrect");

k+=10;

}

else

printf("\nwrong");

}

if(cs1==3)

{

cs1=1;

sc+=10;

printf("\n(c)who is the captain of indian cricket team?");

printf("\n1.M.S.Dhoni\n2.V.kohli\nYuvraj Singh");

scanf("%d",&j);

if(j==2)

{

printf("\ncorrect");

k+=10;

}

else

printf("\nwrong");

}

break;

case 2:

cs2++;

if(cs2==1)

{

sc+=10;

printf("\n(a)who was the 1st president of India?");

printf("\noptions\n1.Rajindera Prasad\n2.D.r Radha Krishnan\n3.Zakir Husain");

scanf("%d",&j);

if(j==1)

{

printf("\ncorrect");

k+=10;

}

else

printf("\nwrong");

}

if(cs2==2)

{

sc+=10;

printf("\n(b)who is the president of America?");

printf("\n1.Barack obama\n2.donald trump\n3george w.bush");

scanf("%d",&j);

if(j==2)

{

printf("\ncorrect");

k+=10;

}

else

printf("\nwrong");

}

if(cs2==3)

{

cs3=1;

sc+=10;

printf("\n(c)who was the 1st president of USA?");

printf("\n1.George Washington\n2.John Adams\n3.Thomas Jefferson");

scanf("%d",&j);

if(j==1)

{

printf("\ncorrect");

k+=10;

}

else

printf("\nwrong");

 }

 break;

case 3:

cs3++;

if(cs3==1)

{

sc+=10;

printf("\n(a)who was the most wanted terrorist in world?");

printf("\n1.osama bin laden\n2.bagdadi\n3.mohammad atif");

scanf("%d",&j);

if(j==2)

{

printf("\ncorrect");

k+=10;

}

else

printf("\nwrong");

}

if(cs3==2)

{

sc+=10;

printf("\n(b)which is the national animal of india?");

printf("\n1.Lion\n2.Dog\n3.Cow");

scanf(" d",&j);

if(j==1)

{

printf("\ncorrect");

k+=10;

}

else

printf("\nwrong");

}

if(cs3==3)

{

cs3=1;

sc+=10;

printf("\n(c)which is the national flower of india?");

printf("\n1.marigold\n2.rose\n3.lotus");

scanf("%d",&j);

if(j==3)

{

printf("\ncorrect");

k+=10;

}

else

printf("\nwrong");

}

break;

case 4:

break;

}

if(sc!=0)

printf("\ndo u want to play the game again.press y/n\n");

else

exit(0);

fflush(stdin);

scanf("%c",&c);

}

while(c=='y'|c=='Y');

printf("\n your score is %d out of %d",k,sc);

getch();

}

NESTED SWITCH :

#include<stdio.h>

#include<conio.h>

void main()

{

char c;

int i;

clrscr();

printf("enter any char");

fflush(stdin);

scanf("%c",&c);

switch(c)

{

case 'a':

printf("enter any num");

scanf("%d",&i);

switch(i)

{

case 1:

printf("one");

break;

case 2:

printf("two");

break;

default:

printf("wrong");

break;

}

break;

case 'b':

printf("enter any num");

scanf("%d",&i);

switch(i)

{

case 3:

printf("three");

break;

case 4:

printf("four");

break;

default:

printf("wrong");

break;

}

break;

default:

printf("wrong char enter");

break;

}

getch();

}

OUTPUT  :-  enter any char a

enter any num 1

  one

enter any char b

enter any num 6

wrong

enter any char d

wrong char enter