Eroare de compilare: user.cpp: In function ‘int ecuatii(int, int, int, int)’: user.cpp:13:17: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(x1 == x4 && y1 == y4 || x2 == x4 && y2 == y4 || x3 == x4 && y3 == y4) ^ user.cpp:13:65: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(x1 == x4 && y1 == y4 || x2 == x4 && y2 == y4 || x3 == x4 && y3 == y4) ^ user.cpp: In function ‘int main()’: user.cpp:41:9: warning: unused variable ‘pn’ [-Wunused-variable] int pn=0,sn=0; ^ user.cpp:41:14: warning: unused variable ‘sn’ [-Wunused-variable] int pn=0,sn=0; ^ user.cpp:43:9: error: ‘pn’ was not declared in this scope pn++; ^ user.cpp:45:9: error: ‘sn’ was not declared in this scope sn++; ^ user.cpp:47:9: error: ‘pn’ was not declared in this scope pn++; ^ user.cpp:49:9: error: ‘sn’ was not declared in this scope sn++; ^ user.cpp:51:9: error: ‘pn’ was not declared in this scope pn++; ^ user.cpp:53:9: error: ‘sn’ was not declared in this scope sn++; ^ user.cpp:54:8: error: ‘sn’ was not declared in this scope if(sn + pn > 2) ^ user.cpp:54:13: error: ‘pn’ was not declared in this scope if(sn + pn > 2) ^ user.cpp:54:7: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(sn + pn > 2) ^