Compilare: main.cpp: In function 'int exp()': main.cpp:66:24: warning: array subscript has type 'char' [-Wchar-subscripts] return v[c[i++]]; ^ main.cpp:47:9: warning: variable 'r' set but not used [-Wunused-but-set-variable] int r; ^ main.cpp: In function 'int main()': main.cpp:119:13: warning: array subscript has type 'char' [-Wchar-subscripts] v[cc]=1-v[cc]; ^ main.cpp:119:21: warning: array subscript has type 'char' [-Wchar-subscripts] v[cc]=1-v[cc]; ^ main.cpp: In function 'int exp()': main.cpp:68:1: warning: control reaches end of non-void function [-Wreturn-type] } ^