Compilare: main.cpp: In function 'int main()': main.cpp:49:9: warning: unused variable 'pp' [-Wunused-variable] int pp = ( 1 << n ); ^~ main.cpp:38:56: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d%d%d%d", &n, &m, &nr_lin, &nr_col ); ^ main.cpp:44:50: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d", &a[ l ][ c ] ); ^ main.cpp:47:50: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d", &a[ l ][ c ] ); ^ main.cpp: In function 'void radixsort(int*, int*, int, int)': main.cpp:29:54: warning: array subscript is above array bounds [-Warray-bounds] freq[ BASE - 2 ] = freq[ BASE - 1 ] = freq[ BASE ] = 0; ~~~~~~~~~~~^