Compilare: user.cpp: In function ‘int ixor()’: user.cpp:52:30: warning: array subscript has type ‘char’ [-Wchar-subscripts] r = v[ ch[i] ]; ^ user.cpp: In function ‘int main()’: user.cpp:133:14: warning: array subscript has type ‘char’ [-Wchar-subscripts] v[ch2]=(v[ch2]+1)%2; ^ user.cpp:133:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] v[ch2]=(v[ch2]+1)%2; ^ user.cpp:68:9: warning: unused variable ‘x’ [-Wunused-variable] int x = strlen(chi); ^ user.cpp:67:25: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(chi, 1003, in); ^ user.cpp:128:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d\n", &n); ^ user.cpp:132:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%c", &ch2); ^