Compilare: user.cpp: In function ‘int main()’: user.cpp:92:37: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%i%i%i%i",&n,&m,&x,&y); ^ user.cpp:97:37: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%i", &a[i][j]); ^ user.cpp: In function ‘void maxim(int, int, int, int)’: user.cpp:70:5: warning: ‘max2’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(max1<max2) ^ user.cpp:74:28: warning: ‘gr2’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(v[gr1].k>v[gr2].k) ^