I am trying to call an interface function and print out the resulting values. The function prototype contains pointers to character string as arguments. When I print out the resulting values I receive some strange symbols. Is my below approach correct?
int interfacecall(char *a, char *b ...);
char * a= "Testdata";
char b [4098];
result= interfacecall(a,b);
//different value is returned in b via function implementation in a third party dll.
printf(b);
Your printf is not that safe. It should be :
printf("%s", b); //corrected - safe!
In C++, you can also use std::cout
as:
std::cout << b; //its simpler - must include<iostream>
Make sure that b
is a null-terminated c-string, otherwise it wil print garbage and may crash your program. Null-terminated string means it must end with \\0
. Something like this:
b[slen] = '\0'; //you may have to do this explicitly!
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