Compilare: user.c: In function ‘main’: user.c:55:5: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d", &n ); ^~~~~~~~~~~~~~~~~~~~~~~ user.c:58:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d", &cost[i] ); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ user.c:63:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &k ); ^~~~~~~~~~~~~~~~~~~~~~ user.c:65:13: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &x ); ^~~~~~~~~~~~~~~~~~~~~~