Main.cc: In function 'int main()': Main.cc:5:23: error: expected ')' before ';' token for(n=0;n<=100000;i=0;i<=1000;i++){ ^ Main.cc:5:25: warning: statement has no effect [-Wunused-value] for(n=0;n<=100000;i=0;i<=1000;i++){ ^ Main.cc:5:35: error: expected ';' before ')' token for(n=0;n<=100000;i=0;i<=1000;i++){ ^ Main.cc:4:11: warning: unused variable 'a' [-Wunused-variable] int n,a,i; ^