func: static void goodB2G() char * data ; char * * dataPtr1 = & data ; char dataBuffer [ 100 ] = "" ; data = dataBuffer; char * data = * dataPtr1 ; size_t dataLen = strlen ( data ) ; strncat ( data + dataLen , environment , 100 - dataLen - 1 ); * dataPtr1 = data; printf ( "%s\n" , data ); 