Compilare: user.c: In function ‘mat_pow’: user.c:44: warning: passing argument 1 of ‘mat_mult’ from incompatible pointer type user.c:9: note: expected ‘long int (*)[3]’ but argument is of type ‘long unsigned int (*)[3]’ user.c:44: warning: passing argument 2 of ‘mat_mult’ from incompatible pointer type user.c:9: note: expected ‘long int (*)[3]’ but argument is of type ‘long unsigned int (*)[3]’ user.c:46: warning: passing argument 1 of ‘mat_mult’ from incompatible pointer type user.c:9: note: expected ‘long int (*)[3]’ but argument is of type ‘long unsigned int (*)[3]’ user.c:46: warning: passing argument 2 of ‘mat_mult’ from incompatible pointer type user.c:9: note: expected ‘long int (*)[3]’ but argument is of type ‘long unsigned int (*)[3]’ user.c: In function ‘main’: user.c:79: warning: format ‘%d’ expects type ‘int’, but argument 2 has type ‘long unsigned int’ user.c:71: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result user.c:72: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result user.c:73: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result user.c:77: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result