NEED CODE

HELPS WITH C PROGRAMMING. ISSUES EXPLAINED IN BOLD.

COMPARING TWO LETTERS AND CALLING A FUNCTION.

Problem are explained in bold #include #include #include #define pi 3.1415

void Area (double n); void VolSphere (double n); void Circumference (double n); void AllCalc (); // i dont know if the declaration of the function is correct AllCalc = AllCalculations

//function main begins program execution int main (void) { puts("-Calculating Circle Circumference, Circle Area or Sphere Volume- "); void (*f[4]) (double) = {Circumference, Area, VolSphere, AllCalc};

int pick; float r, r2; char choice;

//suppose user want to enter radius = 10;

printf(" What is the radius of the circle?: "); //the user can either enter: r 10 or R 10 (for the radius) or d 10 D10 (for the diameter) scanf("%s%f", choice, &r2); //i am scanning letter and number to compare with d D r and R

if (choice == 'd' || 'D') // right here i am comparing choice with d or D. If user entered d 10 then i want to devide radius by 2. If not, remains the same r = r2/2; //for some reason the program is not running i tried "strcmp(choice, "d")" but it didnt work either. I dont know if it is if statement or i am going the wrong way

else { r = r2;

}

printf( " Pick a number according to what you want to calculate: " "0 = Circumference | 1 = Area | 2 = Volume | 3 = All Calc | 4 = End Program: "); scanf( "%d", &pick);

while ( pick >= 0 && pick < 4 ) { (*f[pick])(r);

printf( " Pick a number according to what you want to calculate " "0 = Circumference | 1 = Area | 2 = Volume | 3 = All calculations | 4 = End program: "); scanf ( "%d", &pick); } }

void Circumference (double n) { puts(" -CIRCUMFERENCE-"); printf( " The radius is %.2f " , n); printf( "The circumference of the circle is: %.2f " , 2 * pi * n); }

void Area (double n) { puts(" -AREA-"); printf( " The radius is %.2f " , n); printf( "The area of the circle is: %.2f " , pi * n * n);

}

void VolSphere (double n) {

puts(" -VOLUME-"); printf( " The radius is %.2f " , n); printf( "The volume of the circle is: %.2f " ,(4 * pi * n * n * n)/3); }

void AllCalc () //Inside of this function i need to call all 3 (Volume, area, circumference) to make a summary of the calculations. Preferably using pointers

{

//here the output should be something like

Circumference is: ....

Volume is:......

Area is:........

}