problem with library

shetty · 10-01-2010, 11:27 AM

#include"iostream.h"
#include<conio.h>
#include "string.h"

int main()
{
int lenM;
char str[]="test";
int len=strlen(str);
int i;
for(i=0;i<len;i++)
{
cout<<str[i]<<i[str]<<*(str+i)<<*(i+str);
}
lenM=len/2;
len--;
for(i=0;i<lenM;i++)
{
str[i]=str[i]+str[len-i];
str[len-i]=str[i]-str[len-i];
str[i]=str[i]-str[len-i];
}
cout<<"string reversed\n";
}

when i try to compile this program i am getting error as shown below pleae help me
string.cc:1:21: error: iostream.h: No such file or directory
string.cc:2:18: error: conio.h: No such file or directory
string.cc: In function ‘int main()’:
string.cc:13: error: ‘cout’ was not declared in this scope
string.cc:23: error: ‘cout’ was not declared in this scope

JohnGraham · 10-01-2010, 12:05 PM

Quote:

Originally Posted by shetty

string.cc:1:21: error: iostream.h: No such file or directory
string.cc:2:18: error: conio.h: No such file or directory
string.cc: In function ‘int main()’:
string.cc:13: error: ‘cout’ was not declared in this scope
string.cc:23: error: ‘cout’ was not declared in this scope

iostream.h is supposed to be just "iostream"
conio.h is a Windows/DOS header - I don't know what functions you want from it, but you don't seem to be using any I've not seen in standard headers, so just remove this line
cout is in the std namespace - either use std::cout or put "using namespace std;" after your #includes.

jf.argentino · 10-01-2010, 02:32 PM

Quote:

iostream.h is supposed to be just "iostream"

<iostream> since it's a standard header

paulsm4 · 10-01-2010, 02:51 PM

Hi -

JohnGraham is right:
1. You shouldn't be using "conio.h" (that's a DOS header that doesn't even exist on Linux).

2. You should use "iostream" and "string" instead of "iostream.h" for C++ (since sometime in the 1980's).

3. You should be using <> instead of "" for system headers.

4. You should be using C++ "string" types instead of C "char[]" arrays.

Etc.

Here's a revised, simplified snippet:

Code:

#include <iostream>
#include <string>
#include <algorithm>

using namespace std;

int
main(int argc, char *argv[])
{
  string str("test");
  cout << "str: " << str << endl;
  cout << "length(str): " << str.length () << endl;
  string strr = str;
  reverse (strr.begin(), strr.end());
  cout << "reverse(str): " << strr << endl;
  return 0;
}

Quote:

g++ -o tmp -Wall -pedantic tmp.cpp

./tmp =>
str: test
length(str): 4
reverse(str): tset

shetty · 10-01-2010, 11:22 PM

thanks for the answers.