Compilare: main.c: In function 'main': main.c:6:5: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("sr.in","r",stdin),freopen("sr.out","w",stdout),scanf("%s%s",s,t); ^~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:6:32: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("sr.in","r",stdin),freopen("sr.out","w",stdout),scanf("%s%s",s,t); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:6:61: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] freopen("sr.in","r",stdin),freopen("sr.out","w",stdout),scanf("%s%s",s,t); ^~~~~~~~~~~~~~~~~