#include<conio.h>

#include<math.h>

void main()

{ clrscr();

int x,x1,y,y1,i=0;

x=x1=35; y=y1=12;

cout<<”\t Starting point ( 35,12 ).\n\t Starting point is notified by * “;

char *comm;

cout<<”\n\tGive your command:”;

cin>>comm;

gotoxy(x,y);

cout<<”*”;

while(comm[i]!=’ ‘)

{ if(comm[i]==’n’)

{ y–;

gotoxy(x,y);

cout<<”n”;

}

if(comm[i]==’s’)

{ x++;

gotoxy(x,y);

cout<<”s”;

}

if(comm[i]==’e’)

{ y++;

gotoxy(x,y);

cout<<”e”;

}

if(comm[i]==’w’)

{ x–;

gotoxy(x,y);

cout<<”w”;

}

i++;

}

cout<<”\n\tEnd point ( “<<x<<” , “<<y<<” )”;

float dist=sqrt((x-x1)*(x-x1)+(y-y1)*(y-y1));

gotoxy(9,16);

cout<<”Total distance : “<<dist;

getch();

}

#include<conio.h>

void main()

{  clrscr();

float A[52], B[52], C[52], k1= 0.008, k2= 0.002, del= 0.1, time= 0.0;

A[0]= 100.0; B[0]= 50.0; C[0]= 0.0;

cout<<”\tTime\tA][i]\t\tB[i]\t\tC[i]\n\n”;

for( int i=0; i<51; i++ ){

cout<<”\t”<< time<<”\t”<< A[i]<<”\t\t”<< B[i]<<”\t\t”<< C[i]<<”\n”;

A[i+1] = A[i] + ( k2 * C[i] – k1*A[i]*B[i] ) * del;

B[i+1] = B[i] + ( k2 * C[i] – k1*A[i]*B[i] ) * del;

C[i+1] = C[i] + 2 * ( k1 * A[i] * B[i] – k2 * C[i] ) * del;

time = time + del;

}

getch();

}

Please share your better concept about this program.

void main(){
clrscr();
int xb[13]={80,90,99,108,116,125,133,141,151,160,169,179,180} ;
int yb[13]={0,-2,-5,-9,-15,-18,-23,-29,-28,-25,-21,-20,-17} ;
float xf[13], yf[13], vf= 20.0, sin, cos, time, distance, dist_range=10 ;

xf[0]= 0.0;  yf[0]= 50.0 ;
for( int i=0; i<13; i++){
distance = sqrt( ( yb[i]-yf[i] ) * ( yb[i]-yf[i] ) + ( xb[i]-xf[i] ) * ( xb[i]-xf[i] ) ) ;
gotoxy( xf[i],yf[i]);
cout<<”b”<<i;
gotoxy( xb[i],yb[i]);
cout<<”f”<<i;
if( distance <= dist_range ){
cout<<”\n\tdistance : “<<distance ;
getch() ;
exit(0) ;
}
else if{
if( time > 12 ){
cout<<”\n\tTarget escepted.” ;
getch() ;
exit(0) ;
}
else{
sin = ( yb[i] – yf[i] )/ distance ;
cos = ( xb[i] – xf[i] )/ distance ;
xf[i+1] = xf[i] + vf * cos ;
yf[i+1] = yf[i] + vf * sin ;
}
}
}
getch();
}

Please share your better concept about this program.