need some help

[angelcd]

hi every one, can anyone explain to me the meaning of this code and what does %d means, ans also &no on this,

scanf("%d",&no);

thanks,

[gurutheexpert]

hi every one, can anyone explain to me the meaning of this code and what does %d means, ans also &no on this,

scanf("%d",&no);

thanks,

A scanf statement is used to accept input. It has 2 parameters -
1st - Format Specifier : it tells the compiler in what format input is to be stored.
various formats may be "%d "-> for integer , "%c" , for character "%f" for
floats.

2nd - parameter is the address of memory where your input is two be stored.
Like your 'no' should be a variable and '&' is "address of operator" means it
is giving you address of no variable.

So we can say that what this state is that store an integer at memory location of "no" variable.

You can have more details of format specification hereFormat Specification

[taylor1211]

i Havew written a program and by all accounts it should work, i have attached the code below this text, can someone compile it and tell me why it is not working, thanks to anyone who knows why it aint working, cheers


#include <iostream.h>
#include <stdio.h>

void choice1();
void choice2();
void choice3();
void choice4();

int main()
{
int choice;

printf(" Choice Menu\n");
printf("------------------\n");
printf("1. Euro Conversion \n");
printf("2. Yen Conversion \n");
printf("3. Austrailian Dollar Conversion \n");
printf("4. Close Program \n");
printf("------------------\n");
printf("Please Select A Conversion Type: ");
scanf("%d", &choice);

cout << choice <<endl;
switch(choice)
{
case '1':
choice1();
break;
case '2':
choice2();
break;
case '3' :
choice3();
break;
case '4' :
choice4();
break;

} // end switch
} //end main

void choice1()
{
float pounds, euros, rate;
cout<<"How many pounds to convert? $";
cin>>pounds;
rate=1.46;
euros = pounds*rate;
cout<<"Converted to €"<<euros;
}

void choice2()
{
float pounds, yen, rate;
cout<<"How many pounds to convert? £";
cin>>pounds;
rate=1.6;
yen = pounds*rate;
cout<<"Converted to $"<<yen;
}

void choice3()
{
float pounds, austrailiandollar, rate;
cout<<"How many pounds to convert? £";
cin>>pounds;
rate=1.98;
austrailiandollar = pounds*rate;
cout<<"converted to &"<<austrailiandollar;
}

void choice4()
{
cout << "hello";
}