简单函数调用2

#include <stdio.h>/* declaration */int myadd(int , int); /* 等价于 int myadd(int a, int b); *//* main */int main(void){    int x = 2;    int y = 3;    printf("%d\n", myadd(x, y));    return 0;}/* function definition */int myadd(int a, int b){    return a + b;}