Main.cc: In function ‘void pingxuan()’: Main.cc:38:5: error: ‘seccess’ was not declared in this scope seccess=false; ^~~~~~~ Main.cc:38:5: note: suggested alternative: ‘success’ seccess=false; ^~~~~~~ success Main.cc: In function ‘int main()’: Main.cc:49:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j