Compilare: user.cpp: In function ‘int main()’: user.cpp:69:19: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&n); ^ user.cpp:70:19: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&m); ^ user.cpp:71:19: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&k); ^ user.cpp:74:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&v[i]); ^ user.cpp:81:20: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&x); ^ user.cpp:82:20: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&y); ^ user.cpp:83:20: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&z); ^ user.cpp: In function ‘int* dijkstra(nod**, int, int)’: user.cpp:53:19: warning: ‘z’ may be used uninitialized in this function [-Wmaybe-uninitialized] tata[p->val]=z; ^ user.cpp: In function ‘int main()’: user.cpp:139:10: warning: ‘c’ may be used uninitialized in this function [-Wmaybe-uninitialized] d+=mat[c][n]; ^ user.cpp:134:8: warning: ‘j’ may be used uninitialized in this function [-Wmaybe-uninitialized] c=v[j]; ^