Error message in C invalid binary - c

Question

I'm getting an error:
Type invalid operands to binary & (have 'int *' and 'int')
here is my program. The problem occurs at line 34 or the fscanf num1
#include <stdio.h>
#include <stdlib.h>
FILE *infile;
FILE *prnt;
main()
{
int num1, num2, nums;
char complex;
float fcost;
char name [11];
infile = fopen ("F:/DATA.txt", "r");
prnt = fopen ("F:/income.txt", "w");
if (infile == 0)
{
printf ("FILE NOT ON DISK\n");
system("pause");
return 0;
}
fprintf (prnt, "%-15s %-23s %6s\n\n", "ABAHLMAN", "Program 1", "PAGE 1");
fprintf (prnt, "\n");
fscanf (infile, " %i %i %i %f %c", &nums &num1 &num2 &fcost &name);
while (!feof (infile))
{
int area = (nums * 200) + (num1 * 300) + (num2 * 450);
float cost = fcost + (area * 75.00);
double income = 12 * ((nums *450) + (num1 * 550) + (num2 *700));
float payback = cost/ income;
fprintf (prnt, "%-10s %5f %7c %9.2f\n", name, payback, area, cost);
fscanf (infile, " %d %d %d %f %c", &nums &num1 &num2 &fcost &name);
}
fclose (infile);
fclose (prnt);
return 0;
}

Answer 1

You are not separating the arguments with comma in fscanf() statements. They should be:
fscanf (infile, " %i %i %i %f %s", &nums, &num1, &num2, &fcost, name);
and
fscanf (infile, " %d %d %d %f %s", &nums, &num1, &num2, &fcost, name);
Note that name is an array and it gets converted into a pointer when you pass it to fscanf(). So, the & operator needs to be dropped. As noted in the comments, the format should be %c for name.
Also, see: What is array decaying?
I'd also suggest to use a standard definition for main() function. main() {..} is outdated and should be avoided.
Instead, you can write it as int main(int).

Answer 2

I see a few problems. First, no commas to separate the arguments for scanf.
Next, the last argument for fscanf should have %s format and be passed name without &.
Next, feof is not the way to control a loop, you should check the return value from fscanf anyway.
You also use the wrong format specifier %c for area in printf which should be %d
Finally be consisent with the use of %d or %i format specifier. Unless you want the user to input in other number bases than decimal, stick to %d.
So I suggest the loop should be
while (fscanf (infile, " %d %d %d %f %s", &nums, &num1, &num2, &fcost, name) == 5)
{
int area = nums * 200 + num1 * 300 + num2 * 450;
float cost = fcost + area * 75.00;
double income = 12 * (nums * 450 + num1 * 550 + num2 * 700);
float payback = cost / income;
fprintf (prnt, "%-10s %5f %7d %9.2f\n", name, payback, area, cost);
}