Compilare: user.c: In function ‘main’: user.c:12:15: warning: format ‘%s’ expects argument of type ‘char *’, but argument 3 has type ‘char (*)[200000]’ [-Wformat=] fscanf(in,"%s",&ch); ^ user.c:37:9: warning: unused variable ‘sum’ [-Wunused-variable] int sum = 0; ^ user.c:11:5: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d",&n); ^ user.c:12:5: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%s",&ch); ^