程序设计竞赛OJ平台代码提交中G++编译和C++编译的区别及注意事项

G++和C++编译的区别

G++

输出double类型时,scanf用%lf,printf用%f

double a = 0.0;
scanf("%lf", &a);
printf("%f\n", a);

对于64位整数,申请时用_int64,scanf用%I64d,pirntf用%I64d

_int64 b = 2e50;
scanf("%I64d", &b);
printf("%I64d\n", b);

C++

输出double类型时,scanf用%lf,printf用%f

double a = 0.0;
scanf("%lf", &a);
printf("%f\n", a);

对于64位整数,申请时用long long,scanf用%lld,pirntf用%lld

long long b = 2e50;
scanf("%lld", &b);
printf("%lld\n", b);