主要问题是在main()外面已经定义了一个jcb结构体数组，在main()里又定义了一个jcb结构体数组，并且赋值。程序只识别外部jcb[]，但这个结构体是空的，所以会产生错误。稍微改动一下就可以了。include"stdio.h"include"conio.h"define N 4 struct jcb { char name[4];int length;int printer;int t...
std::is_void std::is_null_pointer std::is_array std::is_pointer std::is_enum std::is_union std::is_class std::is_function std::is_object std::is_scalar std::is_compound std::is_floating_point std::is_fundamental std::is_arithmetic std::is_reference std::is_lvalue_reference std...
When you use a floating-point type specifier in the format string of a call to a function in theprintforscanffamily, you must specify a floating-point value or a pointer to a floating-point value in the argument list to tell the compiler that floating-point support is required. To handle...
Floating-point constants have type float, double, or long double.A floating-point constant without an f, F, l, or L suffix has type double. If the letter f or F is the suffix, the constant has type float. If suffixed by the letter l or L, it has type long double. For example:...
在格式化字符时：f 是浮点数类型 d 是整数类型 因为x1 ,x2 都是整数，所以%f问题，但%d没有问题。问题出在这：%format= %f + "ormat" 你这么看就应该明白了。
Floating-point constants are positive unless they're preceded by a minus sign (-). In this case, the minus sign is treated as a unary arithmetic negation operator. Floating-point constants have typefloat,double, orlong double. A floating-point constant without anf,F,l, orLsuffix has typedou...
Floating-point constants are positive unless they are preceded by a minus sign (–). In this case, the minus sign is treated as a unary arithmetic negation operator. Floating-point constants have typefloat,double,long, or long double.
47: Illegal use of floating point — 非法的浮点运算48: Illegal use of pointer — 指针使用非法49: Improper use of a typedefsymbol — 类型定义符号使用不恰当50: In-line assembly not allowed — 不允许使用行间汇编51: Incompatible storage class — 存储类别不相容52: Incompatible type conversion — ...
If you are only using floating-point for a few calculations, it might be better to reimplement the calculations themselves using fixed-point arithmetic only. Although it might be difficult to see just how this can be done, it is theoretically possible to perform any floating-point calculation wi...
printf("character: %c\ninteger:%d\nfloating point: %f\n", 'A', 34, 3.14); system("pause"); return 0; } 1. 2. 3. 4. 5. 6. 7. 8. 字符常量要用单引号括起来,例如上面的'}',注意单引号只能括一个字符而不能像双引号那样括一串字符,字符常量也可以是一个转义序列,例如'\n',这时虽然...