Thread: fatal error: iostream: No such file or directory

Code:

#include <iostream>
using namespace std; //Added
//
#include <iomanip>




int main()
{
int product, quantity;
double total = 0.0;


// display headers
cout << "Enter pairs of item numbers and quantities."
<< "Enter -1 for the item number to end input.\n";
cin >> product;


while ( product != -1 )
{
cin >> quantity;
switch ( product ) // switch statment nested in while
{
case 1:
total += quantity * 2.98;
break; // necessary to exit switch
case 2:
total += quantity * 4.50;
break; //exit switch
case 3:
total += quantity * 9.98;
break; // exit switch
case 4:
total += quantity * 4.49;
break; // exit switch
case 5:
total += quantity * 6.87;
break; // exit switch
default: // catch all other characters
cout << "Invalid product code: " << product
<< "\n Quantity: " << quantity << '\n';
break;// optional; will exit switch anyway
} // end switch


cout << "Enter pairs of item numbers and quantities.\n"
<< "Enter -1 for the item number to end input: ";
cin >> product;
} // end while


cout << setiosflags( ios::fixed | ios::showpoint )
<< "The total retail value was: " << setprecision( 2 )
<< total << endl;


return 0; // indicate successful termination
} // end function

i get "C:\Users\Yeoh Wei Liang\Documents\online retailer sells\Untitled2.c|1|fatal error: iostream: No such file or directory|"
when i compile my program.
Help me...

I using code::block and MinGW

Use fgets(chararray,chararraysize,stdin) with sscanf for cin and puts/printf for cout.

Originally Posted by yeohwl91

printf ("the total retail value was:%d", (what should i write here))

printf ("the total retail value was:%.2f", adoubleorafloatvalue);

thanks to BillyTKid. My problem solved.

Originally Posted by yeohwl91

my lecturer ask us to do c program,not c++
is there anyway to write the c program have the same function with iostream and iomanip?

cin, cout, iostream, iomanip, etc. are all C++ code. C and C++ are two completely separate languages. While some compilers will do both, you will be in for one rude awakening on a C-only compiler... almost every other line in your source code is going to report a syntax error...

You can put some (but not all C stuff into a C++ program... but you can't put ANY C++ into a C program.

Do you not have textbooks you can refer to?

u have done this program in cpp and saved it with extension ".c" . Two solutions exist:
1).save the program as pgname.cpp
2).
(i)use header file #include<stdio.h>
(ii)use printf() in place of cout
(iii)use scanf() in place of cin
the resultant code is as follows:

Code:

#include <stdio>

using namespace std; //Added

//

#include <iomanip>

 

 

 

 

int main()

{

int product, quantity;

double total = 0.0;

 

 

// display headers

printf("Enter pairs of item numbers and quantities.\n Enter -1 for the item number to end input.\n");

scanf("%d",&product);

 

 

while ( product != -1 )

{

scanf("%d",&quantity);

switch ( product ) // switch statment nested in while

{

case 1:

total += quantity * 2.98;

break; // necessary to exit switch

case 2:

total += quantity * 4.50;

break; //exit switch

case 3:

total += quantity * 9.98;

break; // exit switch

case 4:

total += quantity * 4.49;

break; // exit switch

case 5:

total += quantity * 6.87;

break; // exit switch

default: // catch all other characters

printf("Invalid product code: %d \n Quantity: %d",product,quantity);

break;// optional; will exit switch anyway
} // end switch
 

 
cout << "Enter pairs of item numbers and quantities.\n"//change these places also

<< "Enter -1 for the item number to end input: ";
cin >> product;
} // end while
 
 
cout << setiosflags( ios::fixed | ios::showpoint )
<< "The total retail value was: " << setprecision( 2 )
<< total << endl;
 
 
return 0; // indicate successful termination
} // end function

Originally Posted by vikasvijayan

u have done this program in cpp and saved it with extension ".c" . Two solutions exist:
1).save the program as pgname.cpp
2).
(i)use header file #include<stdio.h>
(ii)use printf() in place of cout
(iii)use scanf() in place of cin
the resultant code is as follows:

Which is STILL not C source code. A C compiler will puke on the first line... C doesn't know know either of your headers, it doesn't know the using or namespace keywords and it hasn't got the first clue what to do with cout ...

Both of you need to get your heads into C tutorials... and both of you need to learn the difference between C and C++ ...