Compilare: user.cpp: In function ‘void v1()’: user.cpp:17:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<=k) ^ user.cpp: In function ‘int main()’: user.cpp:52:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(j<k&&a+b<x[1]) ^ user.cpp:52:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(j<k&&a+b<x[1]) ^ user.cpp:60:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(j<k) ^ user.cpp:75:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=n+1; j<=k; j++) ^ user.cpp:79:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1; i<=k; i++) ^ user.cpp:28:23: warning: unused variable ‘nr’ [-Wunused-variable] int n,i,v,j,a,b,c,nr=0; ^