Compilare: user.c: In function ‘back’: user.c:28:2: warning: passing argument 1 of ‘fprintf’ from incompatible pointer type [enabled by default] fprintf("%d\n", mat[n - 1][m - 1]); ^ In file included from /usr/include/stdio.h:934:0, from user.c:1: /usr/include/i386-linux-gnu/bits/stdio2.h:96:1: note: expected ‘struct FILE * restrict’ but argument is of type ‘char *’ fprintf (FILE *__restrict __stream, __const char *__restrict __fmt, ...) ^ user.c:28:2: warning: passing argument 2 of ‘fprintf’ makes pointer from integer without a cast [enabled by default] fprintf("%d\n", mat[n - 1][m - 1]); ^ In file included from /usr/include/stdio.h:934:0, from user.c:1: /usr/include/i386-linux-gnu/bits/stdio2.h:96:1: note: expected ‘const char * restrict’ but argument is of type ‘int’ fprintf (FILE *__restrict __stream, __const char *__restrict __fmt, ...) ^ user.c:11:9: warning: unused variable ‘g’ [-Wunused-variable] FILE * g = fopen("cmlsc.out", "w"); ^ user.c: In function ‘main’: user.c:53:9: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("cmlsc.in", "r", stdin); ^ user.c:54:9: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("cmlsc.out", "r", stdout); ^ user.c:57:7: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &M, &N); ^ user.c:59:8: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &a[i]); ^ user.c:61:8: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &b[i]); ^