Main.cc: In function 'int main()':
Main.cc:14:5: error: expected ',' or ';' before 'for'
for(int i=2;i<=m;i++){
^
Main.cc:14:17: error: 'i' was not declared in this scope
for(int i=2;i<=m;i++){
^
Main.cc:13:9: warning: unused variable 't' [-Wunused-variable]
int t=a[1]
^