Thread: I need only one function in that programm,can anyone write? (scanFraction)

Code:

#include<stdio.h>
#include<stdlib.h>   /*provides function abs*/

/*Function prototypes*/


void scanFraction(int *nump, int *denomp);


char getOperator(void);


void addFractions (int n1, int d1,int n2,int d2,int *nAnsp, int *dAnsp);



void multiplyFractions(int n1, int d1,int n2,int d2,int *nAnsp, int *dAnsp);


int findGcd (int n1,int n2);


void reduceFraction (int *nump, int *denomp);


void printFraction (int num, int denom);



int
main(void)
{
	int n1, d1;								/*Numerator,deminator of first fraction		   */							
	int n2, d2;								/*Numerator,deminator of second fraction	   */	
	char op;								/*Arithmatic operator +-* or /                 */
	char again;								/*y or n depending on user's desire to continue*/
	int nAns, dAns;							/*Numerator ,deminarator of answer			   */



//While.......

	do {
		//Gets a fraction problem
		scanFraction(&n1, &d1);
		op=getOperator();
		scanFraction(&n2, &d2);


		//Computes the result 

		switch (op)  {

		case '+':
			addFractions ( n1,  d1, n2, d2, &nAns,  &dAns);
			break;
		
		
		case '-':
			addFractions ( n1,  d1, -n2, d2, &nAns,  &dAns);
			break;

		case '*':
			multiplyFractions( n1,  d1, n2, d2, &nAns,  &dAns);
			break;

		case '/':


			multiplyFractions( n1,  d1, n2, d2,&nAns,  &dAns);
		}
	
	    reduceFraction ( &nAns,  &dAns);


		//Display 
		printf("\n");
		printFraction(n1,d1);
		printf("%c",op);
		printFraction(n2,d2);
		printf("=");
		printFraction(nAns,dAns);

		//Ask user about ....


		printf("\nDo another problem?(y/n)>");
		scanf("%c",&again);
	
		} while (again=='y'	||	again=='Y');
		return(0);


}
//*****************************************




//void 
//scanFraction(int *nump, int *denomp)
















//*******************************************















char 
getOperator(void)

{
	char op;

	printf("Enter an aritmetic operator (+,-,*,or /)\n>");

	for (scanf("%c", &op);
		op !='+'	&&	op !='-'	&&
		op !='*'	&&  op !='/';

		scanf("%c",&op))  {
	if (op!= '\n')
			printf("%c invalid,reenter operator (+,-,*,/)\n>",op);

		}

		return(op);
}






		
void 
addFractions (int n1, int d1,int n2,int d2,int *nAnsp, int *dAnsp)

{
	int denom,numer,
		signFactor;

	//Finds a common denominator
	denom=d1 * d2;

	//Computes numerator
	numer= n1 * d2 + n2 * d1;

	if (numer * denom >=0)
			signFactor=1;
	else
			signFactor=-1;


	numer=signFactor * abs (numer);
	denom=abs (denom);


	*nAnsp=numer;
	*dAnsp=denom;
}




void 
multiplyFractions(int n1, int d1,int n2,int d2,int *nAnsp, int *dAnsp)

{
	//Displays....

	printf("\nEntering multiplyFractions with\n");
	printf("n1=%d, d1=%d, n2=%d, d2=%d\n",n1,d1,n2,d2);

	*nAnsp=1;
	*dAnsp=1;



}
int 
findGcd (int n1,int n2)

{
	int gcd;

	printf("\n Entering findGcd with n1=%d, n2=%d\n",n1,n2);


	printf("gcd of %d and %d?>", n1,n2);
	scanf("%d",&gcd);



	printf("findGcd returning %d\n",gcd);
	scanf("%d", &gcd);

	return(gcd);

}



void 
reduceFraction (int *nump, int *denomp)

{
	int gcd;

	gcd=findGcd (*nump, *denomp);


	*nump= *nump /gcd;
	*denomp=*denomp / gcd;

}





void 
printFraction (int num, int denom)

{
	printf("%d/ %d",num,denom);
}