Main.cc: In function ‘bool yc(int)’: Main.cc:7:14: error: ‘cnt’ was not declared in this scope if(x%i==0) cnt+=i; ^~~ Main.cc:7:14: note: suggested alternative: ‘cut’ if(x%i==0) cnt+=i; ^~~ cut Main.cc:9:5: error: ‘cnt’ was not declared in this scope if(cnt==x) flag=1; ^~~ Main.cc:9:5: note: suggested alternative: ‘cut’ if(cnt==x) flag=1; ^~~ cut Main.cc:4:6: warning: unused variable ‘cut’ [-Wunused-variable] int cut=0; ^~~