Compilare: user.cpp: In function ‘int main()’: user.cpp:35:26: warning: unused variable ‘max’ [-Wunused-variable] int i, j, n, m, lin, max; ^ user.cpp: In function ‘char nextch()’: user.cpp:12:34: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buf, 1, MAXBUF, fi); ^ user.cpp: In function ‘int main()’: user.cpp:58:18: warning: ‘lin’ may be used uninitialized in this function [-Wmaybe-uninitialized] sol[i][lin] = max; ^