an intresting problem!!! plz help me

[abbaskhan]

hi
this program can get the integral of the polynomial function but, an intresting thing is that doesn't work truth.
exaple for 3x^3+2x^2+1x^1+4x^0
this program get integral 2.25x^4+1.33x^3+0.5x^2+4x^1
this mean only two end array works truth!!!
why? plz help me
(sorry for my bad english )

#include <stdio.h>
#include <conio.h>
#include <stdlib.h>

void integral(float *, int);

int main(){
float *p;
int n,i;
printf("how much sentence: ");
scanf("%d",&n);
p=(float *) malloc (sizeof (float) *(n));

if(!p)
{
printf("allocation failed");
exit(1);
}
for(i=1;i<n;i++){
printf("enter coefficient of %d's sentence: ",i);
scanf("%f",&p[i]);
}
printf("enter fixed amount: ");
scanf("%f",&p[0]);


integral(p,n);

getch();
return 0;
}


void integral(float *p, int n){
int i;


for(i=n-1;i>=0;--i)
p[i]=p[i]/(i+1);

printf("\n\nintegral is: ");
for(i=n-1;i>=0;i--)
printf("+%3.2fx^%d",p[i],i+1);

}

[abbaskhan]

oh, this program works but in main program this cant work!!!

int main(){
float *p;
int n,m,i;
printf("tabe chand jomlei bashad: ");
scanf("%d",&n);
p=(float *) malloc (sizeof (float) *(n));

if(!p)
{
printf("allocation failed");
exit(1);
}
for(i=1;i<n;i++){
printf("zaribe jomleye %d ra vared konid: ",i);
scanf("%f",&p[i]);
}
printf("meghdare sabet ra vared konid: ");
scanf("%f",&p[0]);

printf("\nmeghdari ra vared konid ta meghdare tabe asli, va moshtagh hesab shavad: ");
scanf("%d",&m);

tabe(p,n,m);
moshtagh(p,n,m);
antegral(p,n);

getch();
return 0;
}

void tabe (float *p,int n,int m){
int i;
float ans=p[0];

printf("\ntabe asli:\n");

for(i=n-1;i>=0;i--)
printf("+%3.2fx^%d",p[i],i);

for(i=n-1;i>=1;i--)
ans=pow (m,i)*p[i]+ans;

printf("\nmeghdare tabe bar asase meghdare %d mishavad: %3.2f",m,ans);
}


void moshtagh (float *p, int n, int m){
int i;
float ans;

for(i=n-1;i>0;i--)
p[i]=p[i]*i;

printf("\n\nmoshtaghe tabe:\n ");
for(i=n-1;i>0;i--)
printf("+%3.2fx^%d",p[i],i-1);

ans=p[1];

for(i=n;i>1;i--)
ans=ans+pow(m,i-1)*p[i];

printf("\nmeghdare moshtaghe tabe bar asase meghdare %d mishavad: %3.2f",m,ans);
}

void antegral(float *p, int n){
int i;


for(i=n-1;i>=0;--i)
p[i]=p[i]/(i+1);

printf("\n\nantegrale tabe: ");
for(i=n-1;i>=0;i--)
printf("+%3.2fx^%d",p[i],i+1);

}

[abbaskhan]

my problem solved. sorry for my post. I'm not crazy!!!