2.A
3.A
4.C
5.D
6.B
7.A,b
8.a=0,b=7
9.4 2 7
都对的,请采纳
(1)#include "stdafx.h"
#include <iostream>//.h
using namespace std//
main(){
double F,c
double F,c
cin >>F
c=5.0/9*(F-32.0)
cout <<"F=" <<F <<"c=" <<c <<endl
return 0
}
(2)
#include "stdafx.h"
#include <iostream>
using namespace std
void main(void){
int a,b,he,ji
cout <<"Type 2 integers...\n"
cin >>a >>b
he=a+b
ji=a*b
cout <<"a+b=" <<he <<endl <<"axb=" <<ji <<endl
}