卷心菜投手

摘要： ex1： 1 # include<math.h> 2 # include<stdio.h> 3 4 int main(){ 5 float a,b,c,x1,x2; 6 float delta,real,imag; 7 8 printf("Enter a,b,c:"); 9 10 while(sca 阅读全文