c fscanf 存储字符串

Question

I am using fscanf to read in a file with this format per line:

//FEATURE_ID|FEATURE_NAME|FEATURE_CLASS|STATE_ALPHA|STATE_NUMERIC|COUNTY_NAME|COUNTY_NUMERIC|PRIMARY_LAT_DMS|PRIM_LONG_DMS|PRIM_LAT_DEC|PRIM_LONG_DEC|SOURCE_LAT_DMS|SOURCE_LONG_DMS|SOURCE_LAT_DEC|SOURCE_LONG_DEC|ELEV_IN_M|ELEV_IN_FT|MAP_NAME|DATE_CREATED|DATE_EDITED

Here is the first line of the file, for example:

//913064|Oso Spring|Spring|NM|35|Rio Arriba|039|365418N|1061159W|36.904945|-106.1998199|||||2863|9393|Bighorn Peak|12/01/1991|04/19/2011

My code is this:

int id, state_num, county_num, elev_m, elev_f;
float lat_dec, lon_dec;
char* name[25];
char* class[25];
char* state[25];
char* county[25];
char* lat[25];
char* lon[25];
char* s_lat_dms[25];
char* s_lon_dms[25];
char* s_lat_dec[25];
char* s_lon_dec[25];
char* map_name[25];
char* date_created[25];
char* date_edited[25];

fscanf(data, "%d|%[^|]s|%s|%s|%d|%s|%d|%s|%s|%f|%f|%s|%s|%s|%s|%d|%d|%s|%s|%s", &id, name,
class, state, &state_num, county, &county_num, lat, lon, &lat_dec,
           &lon_dec, s_lat_dms, s_lon_dms, s_lat_dec, s_lon_dec, &elev_m, &elev_f, map_name,
date_created, date_edited);
    printf("id:%d \nname:%s \nclass:%s \nstate:%s \nstate_num:%d \n", id, name, class, state,
state_num);

But when i run it on the command line it prints out this:

id:913064

name:Oso Spring

class:�&6+�

state:

state_num:1178

Why is it not properly storing data in the class char* array? There are some specific bits of the code that need to be kept, like the first string value needs to be able to keep the whitespace, so I added the "[^|]", but once I did this it started inputting nonsense characters in class. I have looked extensively into fscanf but cannot find how to correctly do what I am trying to do. Could someone help me organize this properly, and fill the knowledge hole I cannot seem to fill?

Answer 1

There's no format specifier %[...]s . There's only %[...] . Drop the s , as it causes the fscanf function to look for a literal s in the input.

And as mentioned you have arrays of pointers, not arrays of characters. That means eg state as argument will decay to a pointer to its first element, which in turn is a pointer, and it will have the type char ** which is incorrect for both the %[ and the %s formats.

The array of pointer issue will also lead to problem when calling printf .

A good compiler would warn about the mismatching type and format specifier. If yours don't then try to enable more warnings (using eg -Wall -Wextra with GCC or Clang).