Compilare: user.c: In function ‘main’: user.c:6:9: warning: format ‘%ld’ expects argument of type ‘long int *’, but argument 2 has type ‘int *’ [-Wformat=] scanf("%ld",&x); ^ user.c:15:7: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(y[i]) ^ user.c:4:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("exp.in","r",stdin),freopen("exp.out","w",stdout),scanf("%d%d",&m,&n); ^ user.c:4:40: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("exp.in","r",stdin),freopen("exp.out","w",stdout),scanf("%d%d",&m,&n); ^ user.c:4:68: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] freopen("exp.in","r",stdin),freopen("exp.out","w",stdout),scanf("%d%d",&m,&n); ^ user.c:6:14: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld",&x); ^