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摘要： #include <stdio.h>//声明pi＝3.14#define PI 3.14int main(int argc, const char * argv[]){ /* int a = 10; int b; b = 11; //控制台输出 printf("a = %d\nb = %d",a,b); float pi =3.14; double pi_2 = 3.1415926; printf("pi = %f\n pi_2 = %.2f",pi,pi_2); //char char d = 'a'; printf(&qu 阅读全文