trace through the program and what the output would be. If there is an error explain...

trace through the program and what the output would be. If there is an error explain what to change. 

#include <iostream>
using namespace std;
int fun(int c, int b);
int main(){
    int a = 0, b= 5, c = 10;
    cout<<"a is: "<<a<<" b is: "<<b<<" c is: "<<c<<endl;
    b=fun(a, c);
    cout<<"a is: "<<a<<" b is: "<<b<<" c is: "<<c<<endl;
    while(b==21){
        int a = 3;
        b = a;
        cout<<"a is: "<<a<<" b is: "<<b<<" c is: "<<c<<endl;
    }
    cout<<"a is: "<<a<<" b is: "<<b<<" c is: "<<c<<endl;
    return 0;
}

int fun(int c, int b){
    b = 2*b;
    c = b+1;
    cout<<"a is: "<<a<<" b is: "<<b<<" c is: "<<c<<endl;
    return c;
}

Expert Solution

int fun(int c, int b){
    b = 2*b;
    c = b+1;
    cout<<"a is: "<<a<<" b is: "<<b<<" c is: "<<c<<endl;    //

 ‘a’ was not declared in this scope
    return c;
}

Correct Code

#include <stdio.h>
#include <iostream>
using namespace std;
int fun(int c, int b);
int main(){
int a = 0, b= 5, c = 10;
cout<<"a is: "<<a<<" b is: "<<b<<" c is: "<<c<<endl;
b=fun(a, c);
cout<<"a is: "<<a<<" b is: "<<b<<" c is: "<<c<<endl;
while(b==21){
int a = 3;
b = a;
cout<<"a is: "<<a<<" b is: "<<b<<" c is: "<<c<<endl;
}
cout<<"a is: "<<a<<" b is: "<<b<<" c is: "<<c<<endl;
return 0;
}

int fun(int c, int b){
b = 2*b;
c = b+1;
int a=0; // declared variable a
cout<<"a is: "<<a<<" b is: "<<b<<" c is: "<<c<<endl;
return c;
}

Output:

a is: 0 b is: 5 c is: 10

a is: 0 b is: 20 c is: 21

a is: 0 b is: 21 c is: 10

a is: 3 b is: 3 c is: 10

a is: 0 b is: 3 c is: 10

venereology answered 11 months ago

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