strcmp function error

[toks]

Hello,

i am comparing 2 strings using strcmp function. the first argument is a string vector with 10 elements and the second a string. the if(expression) is working properly, however when i am trying to save the table[1] string to the next string it is not working, which means that the next string is empty.

string surname; // we assume that the surnmame and table[0] are the same strings.
string next ;

if( strcmp(table[0].c_str(), surname.c_str() ) == 0 )
    next = table[1] ;
cout << next ; // the next string is empty 

any help please.

[Tabian]

I did this and it worked fine. Did I misunderstand the question? The vector only has 2 elements, but it's enough to see if it works.

#include <iostream>
#include <string>
#include <vector>
#include <cstring>

using namespace std;

int main()
{
    vector<string> table;
    table.push_back("Smith");
    table.push_back("Jones");
    string surname="Smith"; // we assume that the surnmame and table[0] are the same strings.
    string next;

    if( !strcmp(table[0].c_str(), surname.c_str() )  )
        next = table[1] ;
    cout << next ; // the next string is empty

    return 0;
}

The output in this case is:

Jones

Also note the change I made in line 16. It is not important to the code, but it seems easier to read to me.

[Athar]

Care to explain why you are using strcmp? You should be writing if(table[0]==surname)
Aside from that, you're probably making assumptions that are not true (table[0] being equal to surname or table[1] being not empty). Use the debugger to step through your program.