Compilare: main.c: In function 'main': main.c:6:2: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("muzeu.in","r",stdin),freopen("muzeu.out","w",stdout),scanf("%d\n",&n); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:6:32: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("muzeu.in","r",stdin),freopen("muzeu.out","w",stdout),scanf("%d\n",&n); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:6:64: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] freopen("muzeu.in","r",stdin),freopen("muzeu.out","w",stdout),scanf("%d\n",&n); ^~~~~~~~~~~~~~~~ main.c:9:4: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%c",&c),e[i][j]=251*251; ^~~~~~~~~~~~~~ main.c:17:7: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("\n"); ^~~~~~~~~~~