Compilare: user.c: In function ‘main’: user.c:13:2: warning: format ‘%d’ expects argument of type ‘int’, but argument 3 has type ‘int *’ [-Wformat=] fprintf(writer, "%d", &adunare); ^ user.c:11:8: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(reader, "%d", &a); ^ user.c:12:8: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(reader, "%d", &b); ^ user.c:8:16: warning: ‘a’ is used uninitialized in this function [-Wuninitialized] int adunare= a+b; ^ user.c:8:16: warning: ‘b’ is used uninitialized in this function [-Wuninitialized]