Having trouble with functions

Hello guys!

Okay so I'm making a student budget program for class its a basic program using functions and pointers. Here is the template they want us to start with:

Code:

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main() {
float school, living, transp, otherExp;
float employ, otherInc;
get_expenses(&school, &living, &transp, &otherExp); get_income(&employ, &otherInc);
display_report(school, living, transp, otherExp, employ, otherInc); return;
}

void get_expenses(double* pSchool, double* pLiving, double* pTransp, double* pOther) {
*pSchool = *pLiving = *pTransp = *pOther = 0; return;
}

void get_income(double* pEmploy, double* pOther) {
*pEmploy = *pOther = 0; return;
}

void display_report((double School, double Living, double Transp, double OtherExp, double Employ, double OtherInc) {
return;
}

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I'm working on the first function on Xcode

Code:

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void get_expenses(double* pSchool, double* pLiving, double* pTransp, double* pOther)

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And right away I'm getting an error stating: Conflicting types for 'get_expenses'

...? Not sure what that means.

And after that I'm just adding the scanf's

Code:

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  printf("What is the tuition cost?");
    scanf("%d", %tuition);
    printf("What is the textbook cost?");
    scanf("%d", %textbook);
    printf("What is the school supplies cost?");
    scanf("%d", %tuition);

---

But I realize those are not declared? Should I add global declarations for all my scanf's are is there a easier way I'm not getting

The output should show:

School Expenses: ~~~~~~~~~~~~~~
Tuition (per semester): 1800
Textbooks(per semester): 160 Supplies: 20
Living Expenses: ~~~~~~~~~~~~~
Residence/Rent/Mortgage: 400
Utilities: 50
Phone/Internet: 90
Groceries/Eating out: 200
Entertainment: 50
Transportation: ~~~~~~~~~~~~~
Public Transportation: 104
Car: 0 Auto Insurance: 0
Gas/Maintenance: 0
Other:~~~~~
Any other expenses: 200

Did you prototype your functions before you tried to use them in main()? If your functions take doubles as arguments, why are you using and passing floats?

Better go back to your book and read about scanf too.

Quote:

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Originally Posted by rags_to_riches

Did you prototype your functions before you tried to use them in main()? If your functions take doubles as arguments, why are you using and passing floats?

Better go back to your book and read about scanf too.

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Sorry realized its a & not a % - typo.

Oh thats where the problem is, can you give me an example of how to prototype,

void get_expenses(double* pSchool, double* pLiving, double* pTransp, double* pOther){

Quote:

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can you give me an example of how to prototype

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Code:

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#include <stdio.h>

int addValues(int x, int y);  // <-- function prototype/declaration - note the semi-colon

int main(void)
{
    int sum;

    sum = addValues(2,3);
    printf("Sum is %d\n",sum);
    return 0;
}

int addValues(int x, int y)  // <-- function definition - note no semi-colon here
{
    return x+y;
}

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A function only has to be prototyped before "main()" (as in this example) if it is defined after "main()"