#include <stdio.h>
int add(int a, int b)
{
int result;
result = a+b;
return result;
}
int sub(int a, int b)
{
int result;
result = add(a,-b);
return result;
}
int algorithm()
{
printf("result: %d\n", sub(2,1));
}
int main(int argc, char *argv[])
{
algorithm();
return 0;
}