Thread: [Help] calculato program

im still new to c programming, here is the question of my assignment http://i.imgur.com/jZoDc.jpg?1

someone can help me to fix it ?
here is my code -

Code:

#include <stdio.h>
#include <math.h>

void scan_data(char *op1p, double *num1p);
void do_next_op(char op1, double num1, double *accum);

void main()
{
    double num1;
    char op1;
    double accum;
    accum=0;
    printf("Hit enter to turn the calculator on");
    getchar();

do{

   scan_data(&op1, &num1);
   do_next_op(op1, num1, &accum);

}
while (!(op1 == 'q'));
return(0);
}


void scan_data(char *op1p, double *num1p)
{


    printf("\nEnter an operator [^,*,/,+,-,q (quit): ");
    scanf("%c",&op1p);
    printf("\nEnter a number to calculate for: ");
    scanf("%f",&num1p);
    printf("The result so far is %c %f \n", &op1p, &num1p);
}
void do_next_op(char op1, double num1, double *accum)
{

        switch(op1)
        {
            case '+':
            {
                *accum = *accum + num1;
                break;
            }
            case '-':
            {
                *accum = *accum - num1;
                break;
            }
            case '*':
            {
                *accum = *accum * num1;
                break;
            }
            case '/':
            {
                *accum = *accum / num1;
                break;
            }
            case '^':
            {
                *accum = pow(*accum, num1);
                break;
            }
            case 'q':
            case 'Q':
            {
                break;
            }
    }
}

thank, that part was work but the result was messed up
http://i.imgur.com/X3mBO.png

here the code

Code:

#include <stdio.h>
#include <math.h>

void scan_data(char *op1p, double *num1p);
void do_next_op(char op1, double num1, double *accum);

void main()
{
    double num1;
    char op1;
    double accum;
    accum=0;
    printf("Hit enter to turn the calculator on");
    getchar();

do{

   scan_data(&op1, &num1);
   do_next_op(op1, num1, &accum);

}
while (!(op1 == 'q'));

}


void scan_data(char *op1p, double *num1p)
{


    printf("\nEnter an operator [^,*,/,+,-,q (quit)]: ");
    scanf(" %c",&op1p);
    printf("Enter a number to calculate for: ");
    scanf("%f",&num1p);
    printf("The result so far is %c %f \n", &*op1p, &*num1p);
}
void do_next_op(char op1, double num1, double *accum)
{

        switch(op1)
        {
            case '+':
            {
                *accum = *accum + num1;
                break;
            }
            case '-':
            {
                *accum = *accum - num1;
                break;
            }
            case '*':
            {
                *accum = *accum * num1;
                break;
            }
            case '/':
            {
                *accum = *accum / num1;
                break;
            }
            case '^':
            {
                *accum = pow(*accum, num1);
                break;
            }
            case 'q':
            case 'Q':
            {
                printf("The final result was %f",*accum);
                break;
            }
    }
}

still dont get it , the problem just on the scanf ?

Code:

#include <stdlib.h>
#include <stdio.h>
#include <conio.h>
#include <math.h>


int main(void)
{
   char character;
   float number=0.00, accum=0.00;
   
	printf("Hit enter to turn the calculator on:" );
   getch();

	printf("\n\nEnter an operator [^,*,/,+,-,q(quit): " );
   scanf("%c",&character);

  while (character!='q' && character !='Q')
   {
    printf("Enter a number to calculate for: ");
    scanf("%f",&number);
    printf("%c%.2f",character,number);

    	if(character=='^')
    		accum= pow(accum,number);

   	else if(character=='*')
    		accum= accum * number;

    	else if(character=='/')
    		accum= accum / number;

   	else if(character=='+')
    		accum= accum + number;

    	else if(character=='-')
    		accum= accum- number;

   	printf("\nThe result so far is %.2f\n",accum);

      fflush(stdin); // clears input stream
      fflush(stdout); // clears output stream

      printf("\n\nEnter an operator [^,*,/,+,-,q(quit): ");
      scanf("%c",&character);
    }

   printf("The result so far is %.2f",accum);

 getch();
 return 0;
}

Here is a code example. I will also take a look at your code and see if i can offer some advice

Thank for your codes , and i dont get the flush thingy
--------
back to topic, the do_scan_op do nothing here