help this is urgent

[alfreddoozz]

hello! guys i am new here i am learning c++ in my university and i have an assignment for 2morrow. in this assignment i am asked to make three functions
(which i did ) and call one of these three functions from main randomly.
any idea how to do that

really need help thank you in advance !

[Moschops]

You could use the rand function to generate a random nubmer and use that as the basis of the choice of function.

http://www.cplusplus.com/reference/clibrary/cstdlib/rand/

[Timbo1]

You could use random numbers and then use:

In your main bit of code put

Function1(12, NULL);

Just replace "Function1" with the name of your function. Then replace "12, NULL" with any parameters you might have.

[alfreddoozz]

thank you for your reply i did not really understand what to do. here is my code :
because i cant seem to be able to explain my problem



#include<iostream.h>
#include<iomanip.h>
#include<stdlib.h>

void addition(){

int result=0;
int points=0;
int counter=0;

int nbr1 = 100 % rand() +10;
int nbr2 = 100 % rand() +10;

cout<<nbr1<<" + "<<nbr2<<" = ";
cin>>result;

if(result == nbr1+nbr2){
cout<<" CORRECT ";
points+=10;
return;
}

if(result !=nbr1+nbr2){
counter++;
cout<<"WRONG TRY AGAIN";
}

if (counter == 1){
points+=5;
}


if (counter == 2){
points+=2;
}


if (counter >= 2){
points=0;
cout<<" WRONG!the anwser is "<<nbr1+nbr2<<endl;
return;
}


}








void substraction(){

int result=0;
int points=0;
int counter=0;

int nbr1 = 100 % rand() +10;
int nbr2 = 100 % rand() +10;

cout<<nbr1<<" - "<<nbr2<<" = ";
cin>>result;

if(result == nbr1-nbr2){
cout<<" CORRECT ";
points+=10;
return;

}

if(result !=nbr1-nbr2){
counter++;
cout<<"WRONG TRY AGAIN";
}

if (counter == 1){
points+=5;
}


if (counter == 2){
points+=2;
}


if (counter >= 2){
points=0;
cout<<" WRONG!the anwser is "<<nbr1-nbr2<<endl;
return;
}


}













void multiplication(){

int result=0;
int points=0;
int counter=0;

int nbr1 = 100 % rand() +10;
int nbr2 = 100 % rand() +10;

cout<<nbr1<<" * "<<nbr2<<" = ";
cin>>result;

if(result == nbr1*nbr2){
cout<<" CORRECT ";
points+=10;
return;

}

if(result !=nbr1*nbr2){
counter++;
cout<<"WRONG TRY AGAIN";
}

if (counter == 1){
points+=5;
}


if (counter == 2){
points+=2;
}


if (counter >= 2){
points=0;
cout<<" WRONG!the anwser is "<<nbr1*nbr2<<endl;
return;
}


}

int main(){

return 0;

}












ok now inside main i want to call multilpication, addition and substraction but i want to call them randomly.


here is what the teahcer wants:

Choose operation randomly (addition, substraction or multiplication)



any idea on how to do that ??

[alfreddoozz]

i will try that ! thank you so much for your help really appriciate it :)