#include #includestime. h> void main( int i right=0, error int x, y, op, result, input srand(time(NULL))

#includestdio h float char oper printi“请输入两个数和一个四则运算符(如:3,+,2):”) scanf(\%f,%c, %f\, &operandi, &oper, &operand2 )

#include stdio. h\ #include\math. h' void maino c, P, xI, X2, real, imag printf(“请输入一元二次方程的三个系数:”); scanf(\%f%f%f\, &a, &b, &c)

#include void maino Int x, y, 2, printf(\请输入三个整数xy,z:\) scanf(\%d%d%d\, &x, &y, &z)

if(x>0) printf(\M\) printf(o\) if(y<-4) printf(\N\) else printf(\E\); 补充完整的程序为 ntx=12y=12

#include #include void maino float x, y, z, q, area; printf(\请输入三角形的三条边:\)

#include void maino printf(\请输入变量x的值:\)