C/C++筆記-逗號運算子

/* ,運算子是敘述結合，同等於{} */
if (total < 0) {
  std::cout << "You owe nothing\n" ;
  total = 0 ;
}
// 上面敘述同等於
if (total < 0)
  std::cout << "You owe nothing\n", total = 0;

/* 常用在for迴圈內 */
for(two=0,three=0; two<10; two+=2,three+=3)
  std::cout << two+three ;
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