Compilare: main.c: In function 'main': main.c:11:17: warning: passing argument 1 of 'fscanf' makes pointer from integer without a cast [-Wint-conversion] 11 | fscanf(r, "%d", &w); | ^ | | | int In file included from main.c:1: /usr/include/stdio.h:415:37: note: expected 'FILE * restrict' but argument is of type 'int' 415 | extern int fscanf (FILE *__restrict __stream, | ~~~~~~~~~~~~~~~~~^~~~~~~~ main.c:33:17: warning: passing argument 1 of 'fprintf' makes pointer from integer without a cast [-Wint-conversion] 33 | fprintf(w, "%d", cnt); | ^ | | | int /usr/include/stdio.h:350:38: note: expected 'FILE * restrict' but argument is of type 'int' 350 | extern int fprintf (FILE *__restrict __stream, | ~~~~~~~~~~~~~~~~~^~~~~~~~ main.c:7:14: warning: variable 'b' set but not used [-Wunused-but-set-variable] 7 | FILE* a, *b; | ^ main.c:7:10: warning: variable 'a' set but not used [-Wunused-but-set-variable] 7 | FILE* a, *b; | ^ main.c:11:10: warning: 'r' is used uninitialized [-Wuninitialized] 11 | fscanf(r, "%d", &w); | ^~~~~~~~~~~~~~~~~~~ main.c:6:11: note: 'r' was declared here 6 | int w, r; | ^ main.c:16:16: warning: 'n' is used uninitialized [-Wuninitialized] 16 | while(i<=n) { | ~^~~ main.c:12:17: note: 'n' was declared here 12 | int i, n, is_prim, cnt=0; | ^