Main.cc:14:9: error: stray '\' in program for(int j=1;j<=s1;i\j++){ ^ Main.cc: In function 'int main()': Main.cc:14:24: error: 's1' was not declared in this scope for(int j=1;j<=s1;i\j++){ ^ Main.cc:14:27: warning: for increment expression has no effect [-Wunused-value] for(int j=1;j<=s1;i\j++){ ^ Main.cc:14:29: error: expected ')' before 'j' for(int j=1;j<=s1;i\j++){ ^ Main.cc:14:32: error: expected ';' before ')' token for(int j=1;j<=s1;i\j++){ ^