Compilare: user.cpp: In function ‘int main()’: user.cpp:9:13: warning: unused variable ‘s’ [-Wunused-variable] int a,b,s,con,conm,com,mic,contornu,conj,ga,cd,co,c,div; ^ user.cpp:9:15: warning: unused variable ‘con’ [-Wunused-variable] int a,b,s,con,conm,com,mic,contornu,conj,ga,cd,co,c,div; ^ user.cpp:9:19: warning: unused variable ‘conm’ [-Wunused-variable] int a,b,s,con,conm,com,mic,contornu,conj,ga,cd,co,c,div; ^ user.cpp:13:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d",&a,&b); ^