Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:50:18: warning: converting to non-pointer type ‘char’ from NULL [-Wconversion-null] mat[i].v[k+1]=NULL; ^ user.cpp:72:7: error: ‘nr’ was not declared in this scope nr[i]=mat[i].l-1; ^ user.cpp:78:20: error: ‘nr’ was not declared in this scope while(l<=nr[j] && da==0){ ^ user.cpp:35:25: warning: unused variable ‘ok’ [-Wunused-variable] int n, i, j, k, l, p, ok, tot, maxim, da; ^ user.cpp:37:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &p, &n); ^