Compilare: user.cpp: In function ‘int main()’: user.cpp:69:37: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (f,"%d%d%d%d",&n,&m,&st,&dr); ^ user.cpp:72:40: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (f,"%d%d",&muc[i].x,&muc[i].y); ^ user.cpp:79:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (f,"%d",&cost[i].val); ^ user.cpp: In function ‘void remake()’: user.cpp:56:23: warning: ‘lastnod’ may be used uninitialized in this function [-Wmaybe-uninitialized] trece[ k].y=lastnod; ^ user.cpp: In function ‘int main()’: user.cpp:56:23: warning: ‘lastnod’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.cpp:53:6: note: ‘lastnod’ was declared here int lastnod,l=L; ^