compound interest program

[v1ashiva]

Hi,
I am facing problems while trying to execute the following program to calculate compound interest.Here is my code.
#include<stdio.h>
main()
{
int i,r,n,q;
float a,p,rs,l;
int j,k;
for(i=1;i<=10;i++)
{
printf("enter principle, rate,years,coumpound period");
scanf("%f,%d,%d,%d",&p,&r,&y,&cp);
}
rs=r/100;
for(j=1;j<=n;j++)
{
for(k=1;k<=q;k++)
l=(1+rs/q);
}
a=p*l;
printf("%d",a);
}
}

[DeMan]

Hi v1ashiva,
Welcoem to TSDN. As this looks like a c/c++ question, I will move it on to the appropriate forum. While a link to this thread will be left in the introductions, you can access these forums in future by selecting from the options in the drop-down menus available on the links from the blue bar near the top of the screen.

I hope the c/c++ experts can assist with your enquiry.

[Silent1Mezzo]

Hi,
I am facing problems while trying to execute the following program to calculate compound interest.Here is my code.
#include<stdio.h>
main()
{
int i,r,n,q;
float a,p,rs,l;
int j,k;
for(i=1;i<=10;i++)
{
printf("enter principle, rate,years,coumpound period");
scanf("%f,%d,%d,%d",&p,&r,&y,&cp);
}
rs=r/100;
for(j=1;j<=n;j++)
{
for(k=1;k<=q;k++)
l=(1+rs/q);
}
a=p*l;
printf("%d",a);
}
}

Heya Welcome to TSDN
What kind of problems are you having?

[weaknessforcats]

Floating point number automaticaally round. That means if two floating point numbers are close in value operators like <, >, >=, ==, etc may not work as expected. Numbers only close in value may, or may not, trigger the operator.

Usually, you compare two floating point numbers by absolute value and if the difference is within a specified sigma, you can call thenm equal.

Generally, you do not use floating point for money. In fact, for financial applications, there are laws in Europe against this practice.

I suggest you use ints and calculate in pennies, or mils, or whatever accuracy you need and only use a decimal point in the function you call to display your ints.

If you Google on floating point arithmetic, you will see what I mean.

[v1ashiva]

Hi weaknessforcats
Thanks for your quick reply.Ok now if I dont use float,then how do i carry the value of rs=r(rate)/100.

Floating point number automaticaally round. That means if two floating point numbers are close in value operators like <, >, >=, ==, etc may not work as expected. Numbers only close in value may, or may not, trigger the operator.

Usually, you compare two floating point numbers by absolute value and if the difference is within a specified sigma, you can call thenm equal.

Generally, you do not use floating point for money. In fact, for financial applications, there are laws in Europe against this practice.

I suggest you use ints and calculate in pennies, or mils, or whatever accuracy you need and only use a decimal point in the function you call to display your ints.

If you Google on floating point arithmetic, you will see what I mean.