Thread: int ...float ...

hi, i am very confused about when and were to put float and int.
i know that float is for numbers with decimals (3.14...etc) but when i am writing code i get always confused.

This programm just does some easy calculations, when i give it x,y,z values.
it works with int's but i cant figure out what to change so that it also computes numbers like 1.5 etc..

Code:

int
sin1(int x)
{
int a;
a=pow(x,3);
return a;
}


int
sin2(int x,int y,int z)
{
int b;
b=(x*y*z);
return b;
}


sin1();
sin2();


int main()
{
int x,y,z,c;
scanf("%d%d%d",&x,&y,&z);
c=(sin1(x)+sin2(x,y,z));
printf("f(x)=(x^3)+(x*y*z)= %d",c);
}

Be sure you apply indentation to your code:

Code:

int sin1(int x)
{
    int a;

    a=pow(x,3);

    return a;
}

int sin2(int x,int y,int z)
{
    int b;

    b=(x*y*z);

    return b;
}

sin1();
sin2();

int main()
{
    int x,y,z,c;

    scanf("%d%d%d",&x,&y,&z);
    c=(sin1(x)+sin2(x,y,z));
    printf("f(x)=(x^3)+(x*y*z)= %d",c);
}

• Be sure to include headers
• There are two function calls (lines 19 and 20) outside of any function
• You should have prompts in your program so the user knows what to enter

Originally Posted by Nantia Atzo

i know that float is for numbers with decimals (3.14...etc) but when i am writing code i get always confused.

Use ints when you are working with whole numbers.
Use floats/doubles when you are working with real numbers.

For instance, in the code you provided, is there any reason for ints to be used anywhere?

Matticus,
the two function calls are there because my teacher in university sais we have to do so , outside the main...i am not really sure about the reason but i am searching for it.
for my problem here, i changed every int with float , and every %d to %f and now it works
thank you for your help.