c - sscanf() double showing zeros -

i'm having troubles sscanf() function read doubles. have comma separated text file this:

abc,def,0.465798,0.754314 ghi,jkl,0.784613,0.135264 mno,opq,0.489614,0.745812 etc. 

so first line fgets() , use sscanf() 2 string , 2 double variables.

fgets(buffer, 28, file); sscanf(buffer, "%4[^,],%4[^,],%lf[^,],%lf[^\n]", string1, string2, &double1, &double2);  printf("%s %s %f %f\n", string1, string2, double1, double2); 

but output is:

abc def 0.465798 0.000000 ghi jkl 0.784613 0.000000 mno opq 0.489614 0.000000 

so somehow doesn't scan last float. i've tried %lf[^ \t\n\r\v\f,] , %lf still doesn't work.

change

"%4[^,],%4[^,],%lf[^,],%lf[^\n]" 

to

int result; result = sscanf(buffer, "%4[^,],%4[^,],%lf,%lf", string1, string2, &double1, &double2); if (result != 4) // handle error 

notice & on double1 , double2 - likley typo.

also strongly recommend check result 4. not checking sscanf() result core question. "zeros" printed out result of double2 not having been scanned , retained previous value have been anything. had sscanf() result been checked have reported 3, showing problem between scanning double1 , double2. in larger scene, practice verify all expected values scanned before going on.