Eroare de compilare: main.c:4:1: error: unknown type name 'using' using namespace std; ^~~~~ main.c:4:17: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'std' using namespace std; ^~~ main.c: In function 'read_ch': main.c:33:3: warning: ignoring return value of 'fread', declared with attribute warn_unused_result [-Wunused-result] fread(_in_buff, 1, 131072, _fin); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c: In function 'main': main.c:55:3: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("permutariab.out", "w", stdout); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Non zero exit status: 1