Getting user input in Linux?

Hi,

I run Linux 2.6.18 and am seeking a way in C to get user input. I want
them to have the chance to enter a value and have it assigned to a
variable.

I currently have:

int* s1;

printf("Enter first integer: %d\n",s1);
scanf(&s1);

When I run this it automatically enters 0. It never pauses and thus
does not allow me to type in a value.

Zach
.

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