Thread: Create a program that evaluate an equation?

Hi! I just started to learn C program and I ran into this little problem.

This is the assignment:

Write the C program that evaluates the value of y=pow(c,1+x), for x in the
interval: a<x<=b. Scan double values of a and b>a. Scan a double value c>0.
Then, scan x and evaluate y and y/x. If x is not from the required interval a<x<=b,
scan it again, shown in the output below. If you don't scan it correctly twice in a row,
exit the program (as shown in the output below). To exit, use the function exit(0), but
don't forget to include stdlib.h above the main.

Your output should look like:

Code:

Enter a and b>a:
0.5 2.75
Enter c>0:
1.5
enter a double a<x<=b:
0.25
The x value is = 0.250000
You didn't enter x from a<x<=b!
Enter x from a<x<=b:
2.5
The y value is = 4.133514
The y/x value is = 1.653406

......

On the other hand, if you don't enter proper x twice in a row, you output
should look like:

Code:

Enter a and b>a:
0.5 2.75
Enter c>0:
1.5
enter a double a<x<=b:
0.25
The x value is = 0.250000
You didn't enter x from a<x<=b!
Enter x from a<x<=b:
3.1
You didn't enter x from a<x<=b! Exit!

----------------------------------------------------

This is what I attempted so far:

Code:

#include <stdio.h>
#include <stdlib.h>
int main(void)
{
        int num1, num2, num3, num4;

        printf("Enter a and b>a:");
        scanf("%lf %lf",num1, num2);
        printf("Enter c>0:");
        scanf("%lf",num3);
        printf("Enter a double a<x<=b:");
        scanf("%lf",num4);
        return 0;
}

I am kind of lost right now. Could you guys give out some adivice or hints how to do this. Thank you!