C Code for assembly

//This is some c code I found that could execute the function that we need and get the user input.
//Alexander, Sam, Dawson, Brian
#include <stdio.h>

extern int my_function(int a, int b, char c);

int main()
{
int a;
scanf("%d", &a);//This takes in user input for the first number
int b;
scanf("%d", &b);
char c;
scanf("%d", &b);//Takes in user input for the choice of either (a)ddition, (s)ubtraction, (m)ultiplication, and (d)ivision.
printf("Calling assembly function my_function with x0=%d and x1=%d with choice = %d results in %d\n", a, b, c, my_function(a, b, c));
return (0);
}