Compilare: main.c: In function 'puterelog': main.c:15:17: warning: implicit declaration of function 'inmultire' [-Wimplicit-function-declaration] inmultire( A , C); ^~~~~~~~~ main.c: At top level: main.c:21:6: warning: conflicting types for 'inmultire' void inmultire( int64_t A[2][2] , int64_t B[2][2]){ ^~~~~~~~~ main.c:15:17: note: previous implicit declaration of 'inmultire' was here inmultire( A , C); ^~~~~~~~~ main.c: In function 'main': main.c:49:23: warning: format '%d' expects argument of type 'int *', but argument 3 has type 'int64_t * {aka long int *}' [-Wformat=] fscanf( input , "%d" , &k ); ^ main.c:52:26: warning: format '%lli' expects argument of type 'long long int', but argument 3 has type 'int64_t {aka long int}' [-Wformat=] fprintf(output , "%lli" , C[0][0] + C[0][1] ); ^ main.c: In function 'puterelog': main.c:19:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ main.c: In function 'main': main.c:49:5: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf( input , "%d" , &k ); ^~~~~~~~~~~~~~~~~~~~~~~~~~~