WAP to formatting integer

/*WAP to formatting integer*/

#include<stdio.h>
#include<conio.h>
main( )
{
 int  weight = 63 ;

 printf ( "\nweight is %d kg", weight ) ;
 printf ( "\nweight is %2d kg", weight ) ;
 printf ( "\nweight is %4d kg", weight ) ;
 printf ( "\nweight is %6d kg", weight ) ;
 printf ( "\nweight is %-6d kg", weight ) ;
       getch();
}

WAP to calculate sum of x-[x3/fact(3)]+[x5/fact(5)]...n terms

/*WAP to calculate sum of x-[x3/fact(3)]+[x5/fact(5)]...n terms*/

 
#include<stdio.h>
#include<conio.h>
void main()
{
      int d=1,i,x,n,fact=1;
      float s=0;
      clrscr();    // clear screen.
      printf("\nEnter value of x and n:");
      scanf("%d%d",&x,&n);
      for(i=1;i<=n*2-1;i++)   // loop executes n+2 times
      {
            d=d*x;                 // find x,x^2,x^3...
            fact=fact*i;          // count factorial of i
            if(i%2!=0)
                 s=s+(float)d/fact; //count sum only when i is odd
            else
                 d=-d;             // if even then d becomes -ve.
      }
      printf("The Sum of Series Is :%0.2f",s); // print result
      getch();
} 

WAP to use argc and argv

/*WAP to use argc and argv*/

#include<stdio.h>
#include<conio.h>
main ( int  argc, char  *argv[ ] )
{
 FILE  *fs, *ft ;
 char  ch ;

 if ( argc != 3 )
 {
  puts ( "Improper number of arguments" ) ;
  exit( ) ;
 }

 fs = fopen ( argv[1], "r" ) ;
 if ( fs == NULL )
 {
  puts ( "Cannot open source file" ) ;
  exit( ) ;
 }

 ft = fopen ( argv[2], "w" ) ;
 if ( ft == NULL )
 {
  puts ( "Cannot open target file" ) ;
  fclose ( fs ) ;
  exit( ) ;
 }

 while ( 1 )
 {
  ch = fgetc ( fs ) ;

  if ( ch == EOF )
   break ;
  else
   fputc ( ch, ft ) ;
 }

 fclose ( fs ) ;
 fclose ( ft ) ;
       getch();
}

WAP to Prints file contents on printer

/*WAP to Prints file contents on printer*/

#include<stdio.h>
#include<conio.h>
main( )
{
 FILE  *fp ;
 char  ch ; 

 fp = fopen ( "poem.txt", "r" ) ;

 if ( fp == NULL )
 {
  printf ( "Cannot open file" ) ;
  exit( ) ;
 }

 while ( ( ch = fgetc ( fp ) ) != EOF )
  fputc ( ch, stdprn ) ;
  
 fclose ( fp ) ;
}