C语言基础教程 C语言入门教程

#include #defineP3.14//宏定义 voidtest(); main() { //test(); /*intnum1,num2,num3=9; num1=45; num2=99; //取地址 printf("%d\n%d\n%d\n",&num1,&num2,&num3); //取值 printf("%d\n%d\n%d\n",num1,num2,num3);*/ floatnum=0.45464565; printf("%e\n",num); /*inti=2; floatnum; num=i*P