this program i see in text book and i try to compile it but it does not work ,it does not except string ,i get error say that string not declared so what is the wrong i use gcc compiler

#include <stdio.h>
#include<string.h>
int main( void )
{
string s[4] = {"hello", "help", "save me", "groan"};
char t[] = "help";
string p = s[3];
printf( "%4s?\n", s[0] );
printf( "%s! ", p );
printf( "%10s ", s[2] );
printf( "%i", t == s[1] );
printf( "%c!\n", s[0][0] );
}

 

this program i see in text book and i try to compile it but it does not work ,it does not except string ,i get error say that string not declared so what is the wrong i use gcc compiler

#include <stdio.h>
#include<string.h>
int main( void )
{
string s[4] = {"hello", "help", "save me", "groan"};
char t[] = "help";
string p = s[3];
printf( "%4s?\n", s[0] );
printf( "%s! ", p );
printf( "%10s ", s[2] );
printf( "%i", t == s[1] );
printf( "%c!\n", s[0][0] );
}

You need to specify what namespace 'string' lies in... either write 'std::string' for each instance of string, or 'using namepsace std;' toward the top outside of main()..... also, depending on your compiler, you may get an error in printing a string with printf(I'm not familiar with gcc...), you may need to convert the string to a char*, you can use s.c_str() to convert to a const char*...

 

string p = s[3];

I don't think this can work.
You need to use some kind of strcpy.

It is really called strcpy but of course, does string copy.

 

You need to specify what namespace 'string' lies in... either write 'std::string' for each instance of string, or 'using namepsace std;' toward the top outside of main()..... also, depending on your compiler, you may get an error in printing a string with printf(I'm not familiar with gcc...), you may need to convert the string to a char*, you can use s.c_str() to convert to a const char*...

Also the wrong include file at the top

#include <string>

not


#include <string.h>

 

Also the wrong include file at the top

this depends on the libraries present on the computer... I have both, and both work... since I'm not familiar with gcc, I don't know which comes standard... I have too many c++ libraries

 

this program i see in text book and i try to compile it but it does not work ,it does not except string ,i get error say that string not declared so what is the wrong i use gcc compiler

#include <stdio.h>
#include<string.h>
int main( void )
{
string s[4] = {"hello", "help", "save me", "groan"};
char t[] = "help";
string p = s[3];
printf( "%4s?\n", s[0] );
printf( "%s! ", p );
printf( "%10s ", s[2] );
printf( "%i", t == s[1] );
printf( "%c!\n", s[0][0] );
}

I don't see anything that states whether this is C or C++. What is the extension on your source code file, .c or .cpp? Some compilers (don't know about gcc) use this to determine whether to assume it is C or C++ and configure the compiler options accordingly.

If it is being compiled as a C program, the there is not variable type called "string".