如何修复C ++中非法使用浮点数的错误

Question

I am getting type mismatch and illegal use of floating point error in this C++ program in Turbo C++. Here I am trying to illustrate GO BACK n ARQ protocol but I am not getting why ws variable is involved with error.

#include<iostream.h>
#include<conio.h>
#include<math.h>

int ws,sf,ef,m;       //Type mismatch error
int i,ack[50];
char ch;

void send(int sf){
for(i=sf;i<=(ws-1);i++){
    cout<<"\n\n\nFrame "<<i<<" got acknowledged?(y/n)";
    cin>>ch;
    if(ch=='y'){
        ack[i]=1;
        cout<<"Acknowledgement recieved for frame "<<i;
        }
    if(ch=='n'){
        cout<<"Acknowledgement not recieved for frame "<<i;
        ack[i]=0;
        }
    }
    }
int check()
{
for(int k=0;k<=(ws-1);k++)
{
if(ack[k]==0)
return 1;
}
return 0;
}

int main()
{
int m;
cout<<"Enter the size of data";
cin>>m;
ws=pow(2,m)-1;         //illegal floating point error
sf=0;
ef=sf+ws-1;
send(0);
while(check())
{
for(i=0;i<ws-1;i++)
{
    if(ack[i]==0)
    {
    send(i);
    }
}
}
cout<<"Packet recieved";

getch();
return 0;
}

I want to use ws as a global variable that is used in other functions.

Answer 1

您有一个名称冲突：wsstream已在iostream.h中定义