Compilare: user.cpp: In function ‘int main()’: user.cpp:37:32: warning: format ‘%c’ expects argument of type ‘char*’, but argument 2 has type ‘int*’ [-Wformat=] scanf("%c",&p[i][j]), p[i][j] -= '0', r[i][j] = p[i][j]; ^ user.cpp:32:15: warning: unused variable ‘val’ [-Wunused-variable] int n,i,j,val,l,lr,nr,lp,np; ^ user.cpp:32:19: warning: unused variable ‘l’ [-Wunused-variable] int n,i,j,val,l,lr,nr,lp,np; ^ user.cpp:30:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("figuri2.in","r",stdin); ^ user.cpp:31:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("figuri2.out","w",stdout); ^ user.cpp:33:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n",&n); ^ user.cpp:37:68: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%c",&p[i][j]), p[i][j] -= '0', r[i][j] = p[i][j]; ^