Compilare: user.cpp: In function ‘int main()’: user.cpp:15:24: warning: operation on ‘k’ may be undefined [-Wsequence-point] v[++k]=v2[k]=uc; ^ user.cpp:43:27: warning: format ‘%d’ expects argument of type ‘int’, but argument 3 has type ‘long long int’ [-Wformat=] fprintf(g,"%d",nr2); ^ user.cpp:45:27: warning: format ‘%d’ expects argument of type ‘int’, but argument 3 has type ‘long long int’ [-Wformat=] fprintf(g,"%d",nr1); ^ user.cpp:47:27: warning: format ‘%d’ expects argument of type ‘int’, but argument 3 has type ‘long long int’ [-Wformat=] fprintf(g,"%d",nr2); ^ user.cpp:7:17: warning: unused variable ‘x’ [-Wunused-variable] { long long n,x,y,inv,uc,co,c=0,k=0,i,nr1=0,nr2=0; ^ user.cpp:7:19: warning: unused variable ‘y’ [-Wunused-variable] { long long n,x,y,inv,uc,co,c=0,k=0,i,nr1=0,nr2=0; ^ user.cpp:7:21: warning: unused variable ‘inv’ [-Wunused-variable] { long long n,x,y,inv,uc,co,c=0,k=0,i,nr1=0,nr2=0; ^ user.cpp:7:31: warning: unused variable ‘c’ [-Wunused-variable] { long long n,x,y,inv,uc,co,c=0,k=0,i,nr1=0,nr2=0; ^ user.cpp:10:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%lld",&n); ^