#include <stdio.h>
int main(void)
{
 printf("Hello World!\n");
}

#include <stdio.h>
int main(void)
{
printf("Some say the world will end in fire,\n");
printf("Some say in ice.\n");
printf("From what I’ve tasted of desire\n");
printf("I hold with those who favor fire.\n");
printf("But if it had to perish twice,\n");
printf("I think I know enough of hate\n");
printf("To say that for destruction ice is also great\n");
printf("And would suffice.\n");
}

#include <stdio.h>
int main(void)
{
 int number;
 printf("Enter a number:");
 scanf("%d",&number);
 printf("\n");
 printf("Number you entered : %d\n",number);
 return 0;
}

#include <stdio.h>
#define PI 3.14159
int main(void)
{
 double radius;
 printf("Enter radius:");
 scanf("%lf",&radius);
 printf("\n");
 printf("Circumference of the circle whose radius is %lf is %lf & its area is %lf\n",radius,2*PI*radius,PI*radius*radius);
 return 0;
}

#include <stdio.h>

int main()
{
    int miles,yards;
    double kilometers;
    printf("Enter miles,yards:");
    scanf("%d%d",&miles,&yards);
    kilometers = 1.609*(miles+yards/1760.0);
    printf("\n%d miles & %d yards equals %lf kilometers.\n",miles>
    return 0;
}

#include <stdio.h>
#include <math.h>
int main(void)
{ 
double a;
printf("Enter any number between 0 and 1:\n");
scanf("%d",&a);
sin_a = sin(a);
printf("Sin of %lf is %lf",a,sin_a)

#include <stdio.h>
int main(void)
{
 int outside,weather;
 printf("\nEnter if outside 1(for yes) or 0(for no):");
 scanf("%d",&outside);
 printf("Enter if its raining(1) or not(0):");
 scanf("%d",&weather);
 if(outside && weather)
   printf("\nPlease use an umbrella.\n");
 else
   printf("\nDress normally.\n");
  return 0;
}

#include <stdio.h>

int main(void)
{
    int blanks = 0, digits = 0, letters = 0, others = 0;
    int c;
    
    while ((c = getchar()) != EOF)
    {
        if (c == ' ') 
            ++blanks;
        else if (c >= '0' && c <= '9')
            ++digits;
        else if ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z'))
            ++letters;
        else
            ++others;
    }
    
    printf("blanks = %d,\n digits = %d,\n letters = %d,\n others = %d.\n\n", blanks, digits, letters, others);
    
    return 0;
}

#include <stdio.h>

int main(void)
{
    int blanks = 0, digits = 0, letters = 0, others = 0,totalchars = 0;
    int c;

    for(;(c = getchar())!=EOF;totalchars++)
    {
        if (c == ' ')
            ++blanks;
        else if (c >= '0' && c <= '9')
            ++digits;
        else if ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z'))
            ++letters;
        else
            ++others;
    }

    printf(" Blanks = %d,\n Digits = %d,\n Letters = %d,\n Others = %d\n Total chars = %d\n\n", blanks, digits, letters, others, totalchars);

    return 0;
}

#include <stdio.h>
int main(void)
{
 int speed;
 printf("\nEnter speed as integer:");
 scanf("%d",&speed);                                               speed = (speed<=65)?(65):(speed<=70)?(70):(90);
 switch(speed)
 {
  case 65: printf("\nNo speeding ticket.\n");break;
  case 70: printf("\nSpeeding ticket.\n");break;
  case 90: printf("\nExpensive speeding ticket.\n");break;
  default: printf("\nIncorrect speed.\n");break;
 }
 return 0;
}

#include <stdio.h>
#include <math.h> /* has sin(),abs(),and fabs() */
int main(void)
{
    double interval;
    int i;                                                            double sine,cosine;
    for(i=0;i<=10;i++) // taking values between 0 and 1 as range
    {
        interval = i/10.0;
        sine = sin(interval);
        cosine = cos(interval);
/* here in above lines we called fabs function as interval is
in float */
        printf("sin(%0.3lf) = %0.3lf | cos(%0.3lf) = %0.3lf\n",in>


    }
    return 0;
}

#include <stdio.h>
void myfunc(int x,int y){
int sum;
sum = x+y;
printf("%d",sum);
}

int main(void)
{ int x = 10,y = 20;
  myfunc(x,y);
}

#include <stdio.h>
int myfunc(int x,int y)
{
return x+y;
}

int main(void)
{ int x = 10,y = 20;
  printf("%d",myfunc(x,y));
}

#include <stdio.h>
int square(int);
int cube(int);
int main(void)
{
    int end = 0,i,j;
    printf("I want squares and cubes from 1 to:");
    scanf("%d",&end);
    printf("\nNumber\tSquare\tCube\n");
    for(i=1;i<=end;i++)
    {
     printf("\n %d \t %d \t %d",i,square(i),cube(i));
    }
    printf("\n\n");
    return 0;
};

int square(int x)
{
    return x*x;
}

int cube(int x)
{
    return x*x*x;
}

#include <stdio.h>
long fibonacci(int n)
{
long f2 = 0,f1 = 1,f_old;
int i;
for(i =0;i<n;i++)
{
  f_old = f2;
  f2 = f2+f1;
  f1 = f_old;
}
return f2;
}

int main(void)
{
int n;
for(n=1;n<=10;n++)
{
  printf("%d term = %ld\n",n,fibonacci(n));
}
return 0;
}

#include <stdio.h>
long recursive_fibonacci(int n)
{
if(n<=1)
  return n;
else
  return(recursive_fibonacci(n-1)+ recursive_fibonacci(n-2));
}

int main(void)
{
int n;
for(n=1;n<=10;n++)
{
printf("%d term = %ld\n",n,recursive_fibonacci(n));
}
return 0;
}

#include <stdio.h>
long int factorial(int n)
{
 if(n == 0 | n == 1)
  return 1;
 else
  return(factorial(n-1)*n);
}

int main(void)
{
 int how_many = 0,i;
 printf("I want table of factorial upto :");
 scanf("%d",&how_many);

 for(i=0;i<=how_many;i++)
  printf("\n%d!\t=\t%ld\n",i,factorial(i));
 return 0;
}

#include <stdio.h>
int main(void)
{
int a = 10,*p = &a;
printf("Adress of pointer is %p or %lu  and is pointed to %d",p,p,*p);
return 0;
}

#include <stdio.h>
void swap(int *a, int *b)
{
int temp = *a;
*a = *b;
*b = temp;
}

int main(void)
{
int a = 10,b = 20;
printf("Before swap:\n%d = \t%p or %lu \n%d = \t%p or %lu\n\n",a,&a,&a,b,&b,&b);
swap(&a,&b);
printf("After swap:\n%d = \t%p or %lu\n%d = \t%p or %lu\n",a,&a,&a,b,&b,&b);
}

#include <stdio.h>
int main(void)
{
int SIZE;
printf("Enter number of subjects:\n");
scanf("%d",&SIZE);
int grades[SIZE];
double sum = 0.0;
int i;
printf("\nEnter your grades:\n");
for(i = 0; i<SIZE; i++)
  scanf("%d",&grades[i]);
printf("\nYour grades are:\n");
for(i = 0; i<SIZE; i++)
  printf("%d\t",grades[i]);
printf("\n\n");
                                                                       for(i = 0; i<SIZE; i++)
sum += grades[i];
printf("Your percentage is %.2f %\n\n",sum/SIZE);
return 0;
}

#include <stdio.h>
void swap(int *a,int *b)
{
 int temp = *a;
 *a = *b;
 *b = temp;
}

void print_array(int how_many,int data[],char *str)
{
 int i;
 printf("%s",str);

 for(i = 0;i < how_many;i++)
  printf("%d\t",data[i]);
}

void bubble(int data[],int how_many)
{
 int i,j;
 int go_on;
 for(i=0 ; i<how_many ;i++)
 {
  print_array(how_many,data,"\nInside bubble\n");
  printf("\nEnter a number to continue : ");
  scanf("%d",&go_on);
  for(j=how_many-1;j>i;j--)
   if(data[j-1] > data[j])
    swap(&data[j-1],&data[j]);
  }
 }

int main(void)
{
 int SIZE;
 printf("Enter no. of numbers you want to sort:");
 scanf("%d",&SIZE);
 int num[SIZE];
 printf("Enter %d digits which you want to sort:\n",SIZE);
 for(int i = 0; i<SIZE ; i++)
    scanf("%d",&num[i]);
 print_array(SIZE,num,"Numbers you entered:\n");
 printf("\n\n");
 bubble(num,SIZE);
 print_array(SIZE,num,"\n\nSorted numbers:\n");
 printf("\n\n");
 return 0;
}