Compilare: main.cpp: In function 'int main()': main.cpp:36:26: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d", &n ); ^ main.cpp:39:36: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d", &m[i][j] ); ^ main.cpp:33:23: warning: 'c_max' may be used uninitialized in this function [-Wmaybe-uninitialized] int n, i, j, l_max, c_max; ^~~~~ main.cpp:33:16: warning: 'l_max' may be used uninitialized in this function [-Wmaybe-uninitialized] int n, i, j, l_max, c_max; ^~~~~