Compilare: user.c: In function ‘main’: user.c:10:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("rj.in","r",stdin),freopen("rj.out","w",stdout),scanf("%d%d\n",&m,&n); ^ user.c:10:39: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("rj.in","r",stdin),freopen("rj.out","w",stdout),scanf("%d%d\n",&m,&n); ^ user.c:10:66: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] freopen("rj.in","r",stdin),freopen("rj.out","w",stdout),scanf("%d%d\n",&m,&n); ^ user.c:12:14: warning: ignoring return value of ‘fgets’, declared with attribute warn_unused_result [-Wunused-result] fgets(s,150,stdin); ^