DevOps, CI/CD and Automation

I am trying to compile and run a piece of code on Solar 5.10(sparcv9). This is how the code is

#include <string>

using namespace std;

class samplestring {

public :
int getlength(){
return (header.length());
}

void calculate(){
printf("Header length is %d", getlength());
}

private:
string header;

};

#include <string>
#include <sstream>
#include <iostream>
#include "samplestring.hpp"

using namespace std;

int main()
{

samplestring sample;
sample.calculate();

return(0);
}

The above sample code works fine. But the real code in my application when trying to check the length of the string, it is returning a garbage value in 64bit where as the same code in 32bit gives me the correct value.

Can anyone help me on this.