C/C++便利マクロ

code:macro.c

#define PRINT(fmt, x) printf("%s = " fmt,#x,(x))

#define PRINTLN(fmt, x) printf("%s = " fmt "\n",#x,(x))

#define FOR(i,a,b) for(int i=(a);i<(b);++i)

#define REP(i,n) FOR(i,0,n)

code:macro.cpp

#define PRINTLN(x) std::cout << (x) << '\n'

#define PRINT_HXLN(h,x) std::cout << (h) << ": " << (x) << '\n'

#define PRINT_XLN(x) std::cout << #x << ": " << (x) << '\n'

#define PRINT_HXTLN(h,x,t) std::cout << (h) << ": " << (x) << (t) << '\n'

参考