Compilare: user.cpp: In function ‘int main()’: user.cpp:14:23: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘char (*)[100000]’ [-Wformat=] fscanf(f, "%s", &v); ^ user.cpp:20:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=1; i<strlen(v)-1; i+=2) ^ user.cpp:30:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=1; i<strlen(v)-1; ++i) ^ user.cpp:12:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d",&p); ^ user.cpp:13:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%c",&ch); ^ user.cpp:14:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%s", &v); ^