Compilare: main.c: In function 'main': main.c:26:16: warning: too many arguments for format [-Wformat-extra-args] printf("d",a); ^~~ main.c:29:16: warning: too many arguments for format [-Wformat-extra-args] printf("d",a); ^~~ main.c:31:16: warning: too many arguments for format [-Wformat-extra-args] printf("d",b ^~~ main.c:8:13: warning: unused variable 'r' [-Wunused-variable] int a,b,r; ^ main.c:6:5: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("cmmdc.in","r",stdin); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:7:5: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("cmmdc.out","w",stdout); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:9:5: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&a,&b); ^~~~~~~~~~~~~~~~~~~~