Compilare: user.cpp: In function ‘int fractii(int)’: user.cpp:33:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j2=0;j2<v.size()-1;j2++) ^ user.cpp:35:47: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j3=j2+1;j3<v.size();j3++) ^ user.cpp:22:9: warning: unused variable ‘p’ [-Wunused-variable] int p,j,i,w1,s=0,w=0; ^ user.cpp: At global scope: user.cpp:46:6: warning: ISO C++ forbids declaration of ‘main’ with no type [-Wreturn-type] main() ^