Just began programming and having trouble with integers

Hi, i'm trying to use a long long integer to store a number, but when i run the compiled code i get a negative number. any help?

Code:

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#include <stdio.h>
void main() {
    long long num1;
    num1=600851475143;
    printf("\n%d\n", num1);
}

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Use unsigned long long. Also, use the correct format flag for printf.

can you give me a list of C format flags? i never learned them

In that case add the "ll" suffix to that number, as it tells the compiler to store it using 64 bits.

Code:

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num1=600851475143ll;

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adding the "ll" still returns a minus. using an unsigned long long doesn't work either. Any code examples? Thanks

I'd be %llu, and using unsigned long long together.

Thank you, so I was just using the wrong format flag. I am also using a signed variable, thanks. Problem solved. Now to figure out this Euler problem...

Quote:

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Originally Posted by sfkc1588

can you give me a list of C format flags? i never learned them

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Well that's easy... Click Here!