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C Programming in Linux

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hhbuur:
yes that made a difference, now it is compelling and the output is correct but there i still a problem.

--- Code: ---chapter2_1.c: In function ‘main’:
chapter2_1.c:23:9: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘long unsigned int’ [-Wformat=]
         sizeof(char),sizeof(int),sizeof(float));
         ^
chapter2_1.c:23:9: warning: format ‘%d’ expects argument of type ‘int’, but argument 3 has type ‘long unsigned int’ [-Wformat=]
chapter2_1.c:23:9: warning: format ‘%d’ expects argument of type ‘int’, but argument 4 has type ‘long unsigned int’ [-Wformat=]
chapter2_1.c:25:17: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘long unsigned int’ [-Wformat=]
                 ((STRINGSIZE*3) * sizeof(char)) + sizeof (int) + (2 * sizeof(float)));

--- End code ---


and to your question,  i get my book from bookboom


--- Code: ---http://bookboon.com/
--- End code ---

gold_finger:
Bumping this for the OP.

Anyone here code in C that can help?


@hhbuur,

I have next to no experience, but I think I see one error.  Correct this first, run program again and see if you still get other errors.

I could be wrong, but I believe that "DEFINE" should be "define" in this line:

--- Code: ---#define STRINGSIZE 256
--- End code ---


P.s.  Does the book you're working from have a free version on the Internet?  If yes, can you provide a link to the problem you're working on.

hhbuur:
hi i am trying to learn to program in c. and is using this guide. C Programming in Linux (c) David Haskins 2008
now at chapter2_1.c i got in to a problem the compelling will not run and I can not see what's wrong, is there som help to get?


--- Code: ---#include <stdio.h>
#DEFINE STRINGSIZE 256

int main(int argc, char*argv[])
{
char town[STRINGSIZE]="Guildford";
char county[STRINGSIZE]="Surrey";
char country[STRINGSIZE]="Great Britain";
int population=66773;
float latitude=51.238599;
float longitude=-0.566257;
printf("Town name:%s population:%d\n",town,population);
    printf("County:%s\n",county);
  printf("Country:%s\n",country);
printf("Location latitude:%f longitude: % f\n",latitude,longitude);
      printf("char=%d byte int=%d bytes float=%d bytes\n",
sizeof(char),sizeof(int),sizeof(float));
printf("memory used:%d bytes\n",
((STRINGSIZE*3) * sizeof(char)) + sizeof (int) + (2 * sizeof(float)));
     
      return 0;
--- End code ---


--- Code: ---Programming_In_Linux$ gcc -o data1 chapter2_1.c -lc
chapter2_1.c:7:2: error: invalid preprocessing directive #DEFINE
 #DEFINE STRINGSIZE 256
  ^
chapter2_1.c: In function ‘main’:
chapter2_1.c:11:12: error: ‘STRINGSIZE’ undeclared (first use in this function)
  char town[STRINGSIZE]="Guildford";
            ^
chapter2_1.c:11:12: note: each undeclared identifier is reported only once for each function it appears in
chapter2_1.c:22:2: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘long unsigned int’ [-Wformat=]
  sizeof(char),sizeof(int),sizeof(float));
  ^
chapter2_1.c:22:2: warning: format ‘%d’ expects argument of type ‘int’, but argument 3 has type ‘long unsigned int’ [-Wformat=]
chapter2_1.c:22:2: warning: format ‘%d’ expects argument of type ‘int’, but argument 4 has type ‘long unsigned int’ [-Wformat=]

--- End code ---

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