Main.cc: In function ‘int zhuanjinzhiz(int, int)’: Main.cc:18:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ Main.cc: In function ‘bool huiwen(int)’: Main.cc:27:5: error: ‘slse’ was not declared in this scope slse return 0; ^~~~ Main.cc:27:5: note: suggested alternative: ‘pclose’ slse return 0; ^~~~ pclose Main.cc: In function ‘int main()’: Main.cc:34:31: error: ‘zhuanjinshi’ was not declared in this scope if(jiou(i,jz)&&huiwen(zhuanjinshi(i,jz))){ ^~~~~~~~~~~ Main.cc:34:31: note: suggested alternative: ‘zhuanjinzhiz’ if(jiou(i,jz)&&huiwen(zhuanjinshi(i,jz))){ ^~~~~~~~~~~ zhuanjinzhiz Main.cc: In function ‘bool huiwen(int)’: Main.cc:28:1: warning: control reaches end of non-void function [-Wreturn-type] } ^