Compilare: user.cpp: In function ‘int main()’: user.cpp:67:21: warning: unused variable ‘f’ [-Wunused-variable] int a,b,chr,f; ^ user.cpp:48:21: warning: unused variable ‘d1’ [-Wunused-variable] int i1,j1,i2,j2,d1,d2; ^ user.cpp:48:24: warning: unused variable ‘d2’ [-Wunused-variable] int i1,j1,i2,j2,d1,d2; ^ user.cpp:50:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ferma3.in","r",stdin); ^ user.cpp:51:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ferma3.out","w",stdout); ^ user.cpp:53:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n%d %d\n",&p,&n,&m); ^ user.cpp:56:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%c",&chr); ^ user.cpp:59:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("\n"); ^ user.cpp:95:53: warning: ‘chr’ may be used uninitialized in this function [-Wmaybe-uninitialized] printf("%d %d\n%c\n",a,b,char(chr+'a'-1)); ^