Compilare: user.c: In function ‘main’: user.c:8:18: warning: variable ‘x’ set but not used [-Wunused-but-set-variable] int i=-1,j=0,x; ^ user.c:14:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f_in,"%*[^\"}]"); ^ user.c:15:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f_in,"%c",&c); ^ user.c:17:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f_in,"%[^\"]",a); ^ user.c:19:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f_in,"%c",&c); ^ user.c:20:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f_in,"%*[^\"0123456789]"); ^ user.c:21:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f_in,"%c",&c); ^ user.c:24:19: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f_in,"%[^\"]",a); ^ user.c:30:19: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f_in,"%[0123456789]",a); ^ user.c:35:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f_in,"%c",&c); ^ user.c:42:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f_in,"%*[^:}]"); ^ user.c:43:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f_in,"%c",&c); ^ user.c:47:19: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f_in,"%c",&c); ^ user.c:52:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f_in,"%*[^\"0123456789]"); ^ user.c:53:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f_in,"%c",&c); ^ user.c:56:19: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f_in,"%[^\"]",a); ^ user.c:62:19: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result]