hi
can any one guide what iam doing wrong in this program as dev c++ compiler giving error which i cant understand here is the print screen of the same and the code

/*
  Name: mkbutan 
  Copyright: 
  Author: 
  Date: 02/08/12 20:38
  Description: pg8  1.5
*/
#include<stdio.h>
#include<conio.h>
#define PERIOD   10
#define PRINCIPAL  5000.00
main()
{
int year;
float amtount,value,inrate;
amount = PRINCIPAL;
inrate = 0.11;
year = 0;
while(year<=PERIOD)
{
                   printf("%2d %8.2f\n",year,amount);
                   value = amount + inrate * amount;
                   year = year + 1;
                   amount = value;
                   }
getch();
}

 

You didn't define amount, you defined amtount.

float amtount,value,inrate; 
amount = PRINCIPAL;

 

thanks dear it was my silllllllly mistake , but it took my full day to understand and just rectified by you by just one post
thanks once again

 

hi sir is this code correct? pl help.

/*
  Name: mkbutan
  Copyright: 
  Author: 
  Date: 02/08/12 23:06
  Description: exec 1.5 pg21
*/
#include<stdio.h>
#include<conio.h>
void main()
{
     int r,x;
     float pi;
     printf("Enter the Radius : \n",r);
     scanf("%d",r);
     x = (2*pi*r)*(2*pi*r);
     printf("The Area of a Circle is : %d",x);
     getch();
     }

 

The area of a circle is ∏ times radius squared, or in C:

x = pi*r*r; // since C doesn't have a square function

And don't forget to define pi either.

It looks like you want to calculation to be repeated over and over... hence your getch() To get that to work you need to put the code inside a loop.

 

It looks like you want to calculation to be repeated over and over... hence your getch() To get that to work you need to put the code inside a loop.

Hi ErineM,

When C programs run in a console, the console terminates as soon as the program finished. If one wants to see the results, he need to prevent that from happening. That might be the reason for the getche().