Thread: Homework Help

Hey Guys , i need some help with my code.

i followed the design structure diagram, and it doesnt want to compile.

Here is the code:

Code:

#include <stdio.h>
#include <string.h>



double enterBase(double);
double CalcOut(double);

int main(void)
{
	int inBase,outBase,result[100],decimal,error,i;
	char inStr[100];



	printf("NUMBER BASE CONVERSION\n");

	printf("Enter the input number base (2-10): ");
	enterBase(inBase);

	printf("Enter the output number base (2-10): ");
	enterBase(outBase);

	printf("Enter the number: ");
	fflush(stdin);
	gets(inStr);

	decimal = 0;
	error = 0;

	for(i = 0 ; 0  > strlen(inStr); i = i -1)
	{
		if(inStr[i] < '0' || inStr[i] >= '0' + inBase)
		{
			error = 1;
		}

		else
		{

			decimal = decimal*inBase + inStr[i] - '0';
		}

	}

	if(error = 1)
	{
		printf("INVALID NUMBER");

	}

	else
	{
		printf("%c  in %d is ",inStr,inBase);

		
		if(decimal = 0)
		{
			printf("zero in any base");
		}

		else
		{
			double calcOut(double decimal, double outBase);
			
		}



}

double enterBase(double base)
{

	do
	{
		printf(" ");
		fflush(stdin);
		scanf("%lg", &base);

		if(base < 2 || base > 10)
		{
			printf("Error: Invalid base\n");

			printf("Re-enter the base (2-10): ");
			fflush(stdin);
			scanf("%lg", &base);
		}


	}while(base < 2 || base > 10);

	return base;
}


double calcOut(double number, double base)
{
	int result;
	int index[100];

	index[100] = 0;

	while(number > 0)
	{
		result[index] = number%base;
		index = index +1;

		number = number/base;

	}

	while(index = 0)
	{
		index = index -1;
		printf("%d",result[index]);
	}

	printf(" in base %lg",base);
}

Hey could you run it in visual studio. youll see couple errors.

Error 2 error C2143: syntax error : missing ';' before 'type' c:\users\user\downloads\numberbaseconversion.c 80
Error 3 error C2065: 'base' : undeclared identifier c:\users\user\downloads\numberbaseconversion.c 87
Error 4 error C2065: 'base' : undeclared identifier c:\users\user\downloads\numberbaseconversion.c 89
Error 5 error C2065: 'base' : undeclared identifier c:\users\user\downloads\numberbaseconversion.c 89
Error 6 error C2065: 'base' : undeclared identifier c:\users\user\downloads\numberbaseconversion.c 95
Error 7 error C2059: syntax error : 'while' c:\users\user\downloads\numberbaseconversion.c 99
Error 8 error C2059: syntax error : 'return' c:\users\user\downloads\numberbaseconversion.c 101
Error 9 error C2059: syntax error : '}' c:\users\user\downloads\numberbaseconversion.c 102
10 IntelliSense: expected a ';' c:\users\user\downloads\numberbaseconversion.c 81

Thanks man, you've been really helpful.

The reason for creating separate functions is because that is what my lecturer has instructed me to do for homework, creating those two separate functions then calling it when it is needed.

Seems rather convoluted, but whatever gets you a passing mark, I guess, haha.

And no problem, good luck.

Code:

fflush(stdin);
gets(inStr);

Good god, do not do either of these things!!!!

Cprogramming.com FAQ > Why gets() is bad / Buffer Overflows
Cprogramming.com FAQ > Why fflush(stdin) is wrong