triunghi1.cpp: In function 'int main()': triunghi1.cpp:8: error: 'n' was not declared in this scope triunghi1.cpp:8: error: 'k' was not declared in this scope triunghi1.cpp:9: error: 'i' was not declared in this scope triunghi1.cpp:10: error: 'v' was not declared in this scope triunghi1.cpp:12: error: 'st' was not declared in this scope triunghi1.cpp:13: error: 'dr' was not declared in this scope triunghi1.cpp:15: error: 'pivot' was not declared in this scope triunghi1.cpp:15: error: 'v' was not declared in this scope triunghi1.cpp:16: error: 'left' was not declared in this scope triunghi1.cpp:17: error: 'right' was not declared in this scope triunghi1.cpp:23: error: 'aux' was not declared in this scope triunghi1.cpp:32: error: expected primary-expression before 'else' triunghi1.cpp:32: error: expected ';' before 'else' triunghi1.cpp:38: error: 'v' was not declared in this scope