# 1 "prog.cpp"
# 1 "<built-in>" 1
# 1 "<built-in>" 3
# 379 "<built-in>" 3
# 1 "<command line>" 1
# 1 "<built-in>" 2
# 1 "prog.cpp" 2
# 1 "./calc.h" 1
void add(int,int);
void sub(int,int);
void mul(int,int);
# 2 "prog.cpp" 2

int main()
{
    add(3,7);
    sub(3,7);
    mul(3,7);
    return 0;
}