Compilare: user.cpp: In function ‘int main()’: user.cpp:2:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] int main() {freopen("ceas3.in","r",stdin);freopen("ceas3.out","w",stdout); ^ user.cpp:2:74: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] int main() {freopen("ceas3.in","r",stdin);freopen("ceas3.out","w",stdout); ^ user.cpp:3:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] while (1) {int a;scanf("%d",&a);if (feof(stdin)) break;int m=a*2;int h=m/60;m=m-h*60;h=(h+9)%12;if(h<10) printf("0");printf("%d:",h);if (m<10) printf("0");printf("%d\n",m);}return 0; ^