Compilare: main.cpp: In function 'double dist_x(point, point, point)': main.cpp:36:24: warning: unused variable 'd' [-Wunused-variable] double a, b, c, d; ^ main.cpp: In function 'int main()': main.cpp:193:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<muchii.size();i++) ~^~~~~~~~~~~~~~ main.cpp:234:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<muchii.size();i++) ~^~~~~~~~~~~~~~