Calculator loop problem

[Laika1986]

Hi, I am trying to create a calculator program that only allows the user three attempts, my actul calculator program works fine however i cant figure out where the while loop should go here is my attempt. When i compile it it runs through the calculator but stops after taken the second num!

#include <stdio.h>

main()


{


int num1, num2, sum;


int count=0;


char operation,dummy;




printf("Enter first number: "); /*retrieves first number from user */


scanf("%d", &num1);


printf("Enter operation (+ or - or * or /): "); /* retrieves operation from user */


scanf("%c%c%c",&dummy,&operation,&dummy);


printf("Enter second number: "); /*retrieves second number from user */


scanf("%d", &num2);


while(count<3)


if (operation == '+'){
	sum = num1 +  num2;
	printf("The sum of %d and %d is %d", num1,num2, sum);
	
	} /* if operation is +, will add numbers and show answer */
	
if(operation == '-'){
	sum = num1-num2;
	printf("Subtracting %d from %d is %d", num2,num1,sum);
	
	}/* if operation is -, will subtract and show answer */
	
if (operation == '*'){	
	sum = num1 * num2;
	printf("Multiplying %d by %d is %d", num1, num2, sum);
	
	} /* if operation is *, will multiply and show answer */
	
if (operation == '/'){
	sum = num1 / num2;
	printf("Dividing %d by %d is %d", num1, num2, sum);
	
	}
	/* if operation is /, will divide and show answer */


	count=count+1;
	
return 0;


}

[anduril462]

Be explicit when you declare main. It's int main(void), not just main(). Read this link.

The general format for a while loop is

while (some condition is true)
{
}

Everything that you want repeated 3x needs to go in those curly braces. I always use curly braces when working with loops and if statements, even when I don't need them, so it's clear what I want repeated and what I don't. It's a helpful visual clue. Proper code formatting and indentation would also help you spot this problem, as you would see that only the if (operator == '+') part is currently inside the while. Many editors and IDEs offer an auto-indent feature to help with this.

[Laika1986]

Thanks for the help and advice!quite stupidly i dont indent it properly until i have it finished!which defeats the purpose really!

I have it pretty much working now but it prints the answer three times instead of three attempts!

[anduril462]

I have it pretty much working now but it prints the answer three times instead of three attempts!

Put everything, and I mean everything, that you want repeated inside the while loop. What isn't getting repeated that should be? Put that in the loop too.

[CommonTater]

You've already had a lot of advice on this in other threads, most of which you've chosen to ignore.

Study this code until you understand how it works.

#include <stdio.h>

int main(void)
  {
     int num1, num2, count=0;
     char operation,

     while(count<3)
        {
           printf("Enter <number> < + - / *> <number> : "); 
           scanf("%d %c %d", &num1, &operation, &num2);
 
           switch (operation)
              { 
                 case '+' :        
                    printf("The sum of %d and %d is %d\n", num1, num2, num1 + num2);
                    break;
                 case '-' :	
                    printf("Subtracting %d from %d is %d\n", num2,num1, num1 - num2);
                    break;
                 case '*' :
                    printf("Multiplying %d by %d is %d\n", num1, num2, num1 * num 2);
                    break;
                 case '/' : 	
                    printf("Dividing %d by %d is %d\n", num1, num2, num1 / num2);
                    break ;
                 default :
                    printf("Invalid operation\n"); 
	   }
           count=count+1;
        }
     return 0;
}

The good news is you can't turn this in, since it's published here and your teacher is likely to find it.

[Laika1986]

My teacher would also think that I am about 4 lessons ahead so i do appreciate your input but it's irrelevant. Ill close the thread myself if possible

It was one thread to be fair and how have i ignored it?