illegal pointer?

hello.
im having a trouble in this program of mine.
since im new in the field of advanced turbo c, that's why, i can't think of any possible answer in that illegal pointer error. help me, pretty please?:unsure:
here's the code, i need to use, here is the array, as well as the pointers.

Code:

//scoring system of a pageant
#include<stdio.h>
#include<conio.h>

void main()
{
int no[7];	//number of the candidate
float sd[7];	//speech delivery 50%
float sp[7];	//stage presence 20%
float pe[7];	//poise and elegance 20%
float oa[7];	//overall appearance 10%
float total=0;
int i;
int *a,*b,*c,*d,*e;
for(i=0;i<7;i++)
{
printf("\n speech delivery : %d",i+1);
scanf("%d",&sd[i]);
printf("\n poise and elegance : %d",i+1);
scanf("%d",&pe[i]);
printf("\n stage presence : %d",i+1);
scanf("%d",&sp[i]);
printf("\n overall appearance : %d",i+1);
scanf("%d",&oa[i]);
}
clrscr();
printf("\n NO.\tspeechDelivery\tPoiseandElegance\tstagePresence\tOverallAppearance\ttotal");

for(i=0;i<7;i++)
{
//speech delivery computation
sd=(sd/100)*50;
//poise and elegance computation
pe=(sd/100)*20;
//stage presence computation
sp=(sd/100)*20;
//overall appearance
oa=(sd/100)*10;

total=(sd+pe+sp+oa)/4;

a=&sd[i];
b=&pe[i];
c=&sp[i];
d=&oa[i];
e=&total;

printf("\n\n[%d]\t%f\t%f\t%f\t%f\t%f",i+1,*a,*b,*c,*d,*e);
}

getch();
}

there.
illegal use of pointer in the line of

Code:

//speech delivery computation
sd=(sd/100)*50;
//poise and elegance computation
pe=(sd/100)*20;
//stage presence computation
sp=(sd/100)*20;
//overall appearance
oa=(sd/100)*10;

and another problem is the invalid poiter addition in the line of :

Code:

total=(sd+pe+sp+oa)/4;

can you guys help me? thank you !

 

You've got a few of things going on. Below, you're using the wrong format specifier in scanf.

Code:

for(i=0;i<7;i++)
{
    printf("\n speech delivery : %d",i+1);
    //scanf("%d",&sd[i]); wrong format specifier   
    scanf("%f", &sd[i]);
    // same for other float arrays
}

In the code below, you can't do that with arrays. You need a pointer or use [] for each element. The math here also yields integer division, so you're results may be off. Promote the division to floating point by using sd / 100.0 or whatever.

Code:

for(i = 0; i < 7; ++i)
{
   // sd = (sd / 100) * 50; invalid indexing
   sd[i] = (sd[i] / 100.0f) * 50.0f;
   // same for other arrays
}

You've got the same problem with the line below; that is, you can't manipulate the arrays like that. You're going to have to loop through each of the four arrays to find total.

Code:

total=(sd+pe+sp+oa)/4;

Below, you're using int pointers on floats and also using the wrong format specifier for ints in the printf; those should be "%d" and not "%f". Is there a purpose/requirement for doing that?

Code:

a=&sd[i];
b=&pe[i];
c=&sp[i];
d=&oa[i];
e=&total;

printf("\n\n[%d]\t%f\t%f\t%f\t%f\t%f",i+1,*a,*b,*c,*d,*e);

 

yay. THANK YOU. I guess I still have a lot more to learn about C prog, I hope I can manage to learn that much )) thanks anyway!!!