C calculator I made:

[sanddbox]

He's demonstrated a [small] will to learn, so I'm going to put his earlier immaturity aside and help him as best I can.

@msbachman: You're being too easy on him.

[fashizzlepop]

No. Microscopic, if even existent, will to learn. And "immaturity?" more like a complete dick, disrespectful, and dillusional with an absence of ANY common sense. Not to mention the attitude that he even aimed at YOU sanddbox. I don't see why he hasn't been completely flamed up and out his ass.

[sanddbox]

No. Microscopic, if even existent, will to learn. And "immaturity?" more like a complete dick, disrespectful, and dillusional with an absence of ANY common sense. Not to mention the attitude that he even aimed at YOU sanddbox. I don't see why he hasn't been completely flamed up and out his ass.

Like I said, he appears to have gotten his earlier douchiness. Plus, he's the only 6th grader I've ever seen that actually uses proper spelling and grammar.

[Goatboy]

We don't know how old he is. I can claim to be, and act as if I am, any age I want. I'm only justifying my own decision here. I won't stop you from helping him. But I do think you should reconsider. What kind of message are we sending by feeding him?

[sanddbox]

I wouldn't give two horse shits about his age if it wasn't actually relevant to this thread. It's not the age itself but the level of education that gives him the disadvantage.

[cilpolir]

I got the next code:

Code: Select all

#include <stdio.h>
#include <stdlib.h>
float calculator(float number1, float number2, char teken)
{
    switch(teken)
    {
        case '-':
        return number1-number2;
        break;
        case '+':
        return number1+number2;
        break;
        case '*':
        return number1*number2;
        break;
        case '/':
        return number1/number2;
        default:
        printf("operator not recognised");
    }
}


int main ()
{
    float number1;
    float number2;
    char teken;

    printf("Welcome to my calculator :D");
    while(1)
    {
    printf("\nplease enter the first number(0 to exit): ");
    scanf("%f",&number1);
    if(number1==0)break;
    printf("\nplease enter the operator: ");
    scanf("%s",&teken);
    printf("\nplease enter the second number: ");
    scanf("%f",&number2);
    printf("\nThe result is: %f",calculator(number1,number2,teken));
    }
}


but when I change the "%s" to "%c" it just skips the scanf("%c",&teken) anyone knows why?

[msbachman]

Since you're new to C, newlines probably don't make sense as of yet.

If you were to look at a hexdump of whatever you send over via scanf, you'll see typically that what's going over is something like the following:

Code: Select all

303132333435363738390a

That last character, 0a, is what's causing you your problem; it's the character sent over by pressing the enter key.

The quick fix to this is to take this line and do the following:

Code: Select all

   scanf("\n%s",&teken);


Another fix you could try would be to enter in your first number and press Ctrl+D. I didn't test this but that should work as well. FYI this key combo sends over the EOF.

A good study question would be to look into how to print the value of the EOF. It's easy once you do it once but it might be good practice.

[AgentDerp]

No. Microscopic, if even existent, will to learn. And "immaturity?" more like a complete dick, disrespectful, and dillusional with an absence of ANY common sense. Not to mention the attitude that he even aimed at YOU sanddbox. I don't see why he hasn't been completely flamed up and out his ass.

You get a cookie AND a gold star for describing me perfectly with every single detail.

[fashizzlepop]

No. Microscopic, if even existent, will to learn. And "immaturity?" more like a complete dick, disrespectful, and dillusional with an absence of ANY common sense. Not to mention the attitude that he even aimed at YOU sanddbox. I don't see why he hasn't been completely flamed up and out his ass.

You get a cookie AND a gold star for describing me perfectly with every single detail.

Oh... Are they the cookies your mommy makes? I love those ones. I also enjoy her pink tacos as well.

[insomaniacal]

I've read a few of this dude's posts, and yes, he's a defensive dick. However, I'd like to suggest that if you can't figure out how to do something yourself, looking at someone else's code and understanding how it works will do wonders.

You'll also realize why it's important to make your code readable.