Compilare: user.cpp: In function ‘int main()’: user.cpp:19:84: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(v[i][k]!=0 && v[k][j]!=0 && (v[i][k]+v[k][j]<v[i][j] || v[i][j]==0 && i!=j)) ^ user.cpp:11:21: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d ",&n); ^ user.cpp:14:35: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d ",&v[i][j]); ^