Expected Expression Error when Calling a Function in C

I'm attempting to work with functions for the first time in C. I'm trying to write a classic roll the dice game that rolls a die 10,000 times and then prints out how many times each number has been rolled using functions.

In the code below I keep getting the error code "Expected expression" when trying to set result= roll_die (int num_sides);. It says that it's occurring on the int. When I remove int I get the error code "Use of undeclared identifier 'num_sides' ". How can I fix this?

#include <stdio.h>
#include <stdlib.h>
#include <time.h>

int roll_die(int num_sides){
num_sides = rand() % 6;
num_sides = num_sides + 1;
return num_sides;
}

int main(void)
{
srand((int)time(0));
unsigned int counter, result, num1=0, num2=0, num3=0, num4=0, num5=0, num6=0;
unsigned int num_rolls = 10000;
for(counter=0; counter<=num_rolls; counter++)
{
    result = roll_die (num_sides);
    if(result==1)
        num1++;
    else if(result==2)
        num2++;
    else if(result==3)
        num3++;
    else if(result==4)
        num4++;
    else if(result==5)
        num5++;
    else if(result==6)
        num6++;
    else{
        printf("Error occurred. \n"); return 0;
    }
}
printf("Number of 1s rolled: %d \n", num1);
printf("Number of 2s rolled: %d \n", num2);
printf("Number of 3s rolled: %d \n", num3);
printf("Number of 4s rolled: %d \n", num4);
printf("Number of 5s rolled: %d \n", num5);
printf("Number of 6s rolled: %d \n", num6);
}