Compilare: main.c: In function 'M': main.c:6:22: warning: 'sizeof' on array function parameter 'c' will return size of 'int (*)[3]' [-Wsizeof-array-argument] memset(c,0,sizeof(c)); ^ main.c:4:34: note: declared here void M(int a[][3],int b[][3],int c[][3]) ^ main.c:6:22: warning: argument to 'sizeof' in 'memset' call is the same expression as the destination; did you mean to dereference it? [-Wsizeof-pointer-memaccess] memset(c,0,sizeof(c)); ^ main.c: In function 'main': main.c:15:5: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("kfib.in","r",stdin),freopen("kfib.out","w",stdout),scanf("%d",&n),a[0][1]=a[1][0]=a[1][1]=s[0][0]=s[1][1]=1,memcpy(c,a,sizeof(a)); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:15:34: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("kfib.in","r",stdin),freopen("kfib.out","w",stdout),scanf("%d",&n),a[0][1]=a[1][0]=a[1][1]=s[0][0]=s[1][1]=1,memcpy(c,a,sizeof(a)); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:15:65: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] freopen("kfib.in","r",stdin),freopen("kfib.out","w",stdout),scanf("%d",&n),a[0][1]=a[1][0]=a[1][1]=s[0][0]=s[1][1]=1,memcpy(c,a,sizeof(a)); ^~~~~~~~~~~~~~