# 1 "mul.c"
# 1 "<built-in>"
# 1 "<command-line>"
# 1 "/usr/include/stdc-predef.h" 1 3 4
# 1 "<command-line>" 2
# 1 "mul.c"
# 1 "head.h" 1



int add(int, int);
int sub(int, int);
int mul(int, int);
double div(int, int);
# 2 "mul.c" 2
int mul(int a, int b){
         return a * b;
}