Main.cc:10:20: warning: missing terminating " character printf("max=%d",c)"; ^ Main.cc:10:2: error: missing terminating " character printf("max=%d",c)"; ^ Main.cc: In function 'int main()': Main.cc:11:7: error: expected ';' before 'return' return 0; ^ Main.cc:5:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d,%d", &a, &b); ^