Originally Posted by asifjavaid

hi guys,

i have declared a char pointer. i am using this in itoa() function to convert integer data into hex data e.g

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   char * hexData= NULL;
             itoa(1484820,hexData,16);

char * hexData= NULL; itoa(1484820,hexData,16);

this results in equalent of 1484820 in hex decimal and store it in hexData.

now when I want to some process in hexData(char pointer). when I pass it to my function for further process, the value of hexData(char pointer is changed now contains garbage) see the code below

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main()
{
char * hexData=NULL;
itoa(148420,hexData,16);
printf("%s",hexData);---------------------//output is 243C4
writeinFile(hexData,fptr);
}
 
writeinFile(char* str, FILE *fptr)
{
 
printf("%s",hexData);---------------------//output is 2434C but some time a garbage value
char *hex = new char[30];
printf("%s",hexData);---------------------//output is always garbage value after any new   
                                                          //char *pointer declaration.
 
----
----
----
}
 
}

main() { char * hexData=NULL; itoa(148420,hexData,16); printf("%s",hexData);---------------------//output is 243C4 writeinFile(hexData,fptr); } writeinFile(char* str, FILE *fptr) { printf("%s",hexData);---------------------//output is 2434C but some time a garbage value char *hex = new char[30]; printf("%s",hexData);---------------------//output is always garbage value after any new //char *pointer declaration. ---- ---- ---- } }

I am confused whats problem going on here.
can any tell me its solution?


Asif