Compilare: user.cpp: In function ‘int main()’: user.cpp:14:60: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[1001]’ [-Wformat=] for(j=1;j<=n;j++){b[0]=a[0];b[1]=a[1];scanf("%s",&a);}; ^ user.cpp:20:15: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if((a[0]=='0')&&(b[0]=='1'))if(a[1]=='0')printf("01");else printf("00"); ^ user.cpp:21:15: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if((a[0]=='1')&&(b[0]=='0'))if(a[1]=='0')printf("11");else printf("10");; ^ user.cpp:8:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bunicu.in","r",stdin); ^ user.cpp:9:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bunicu.out","w",stdout); ^ user.cpp:10:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&t); ^ user.cpp:13:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:14:61: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(j=1;j<=n;j++){b[0]=a[0];b[1]=a[1];scanf("%s",&a);}; ^