c语言 有人解答一下吗
#include [stdio.h]
void main( ) {
int n;
scanf("%d",&n);
if (n++<10) printf("%d\n",n);
else printf("%d\n",n--); }
给你写个注释吧：
#include <stdio.h>
void main() {
int n;
scanf("%d", &n); // 输入一个整数
if (n++ < 10) { // 将 n 增加 1 后判断是否小于 10
printf("%d\n", n); // 如果小于 10，输出增加后的 n 值
} else {
printf("%d\n", n--); // 如果大于等于 10，输出 n 减去 1 后的值
}
}
但是存在一个问题，main 函数的定义上存在问题。应该将 void main() 改为 int main()，并在代码结尾加上 return 0。
#include <stdio.h>
int main() {
int n;
scanf("%d", &n); // 输入一个整数
if (n++ < 10) { // 将 n 增加 1 后判断是否小于 10
printf("%d\n", n); // 如果小于 10，输出增加后的 n 值
} else {
printf("%d\n", n--); // 如果大于等于 10，输出 n 减去 1 后的值
}
return 0; // 表示程序正常退出
}
也不知道你要解答什么，打印出来结果是9
//C++ Operators
// Operators specify an evaluation to be performed on one of the following:
// One operand (unary operator)
// Two operands (binary operator)
// Three operands (ternary operator)
// The C++ language includes all C operators and adds several new operators.
// Table 1.1 lists the operators available in Microsoft C++.
// Operators follow a strict precedence which defines the evaluation order of
//expressions containing these operators. Operators associate with either the
//expression on their left or the expression on their right; this is called
//“associativity.” Operators in the same group have equal precedence and are
//evaluated left to right in an expression unless explicitly forced by a pair of
//parentheses, ( ).
// Table 1.1 shows the precedence and associativity of C++ operators
// (from highest to lowest precedence).
//
//Table 1.1 C++ Operator Precedence and Associativity
// The highest precedence level is at the top of the table.
//+------------------+-----------------------------------------+---------------+
//| Operator | Name or Meaning | Associativity |
//+------------------+-----------------------------------------+---------------+
//| :: | Scope resolution | None |
//| :: | Global | None |
//| [ ] | Array subscript | Left to right |
//| ( ) | Function call | Left to right |
//| ( ) | Conversion | None |
//| . | Member selection (object) | Left to right |
//| -> | Member selection (pointer) | Left to right |
//| ++ | Postfix increment | None |
//| -- | Postfix decrement | None |
//| new | Allocate object | None |
//| delete | Deallocate object | None |
//| delete[ ] | Deallocate object | None |
//| ++ | Prefix increment | None |
//| -- | Prefix decrement | None |
//| * | Dereference | None |
//| & | Address-of | None |
//| + | Unary plus | None |
//| - | Arithmetic negation (unary) | None |
//| ! | Logical NOT | None |
//| ~ | Bitwise complement | None |
//| sizeof | Size of object | None |
//| sizeof ( ) | Size of type | None |
//| typeid( ) | type name | None |
//| (type) | Type cast (conversion) | Right to left |
//| const_cast | Type cast (conversion) | None |
//| dynamic_cast | Type cast (conversion) | None |
//| reinterpret_cast | Type cast (conversion) | None |
//| static_cast | Type cast (conversion) | None |
//| .* | Apply pointer to class member (objects) | Left to right |
//| ->* | Dereference pointer to class member | Left to right |
//| * | Multiplication | Left to right |
//| / | Division | Left to right |
//| % | Remainder (modulus) | Left to right |
//| + | Addition | Left to right |
//| - | Subtraction | Left to right |
//| << | Left shift | Left to right |
//| >> | Right shift | Left to right |
//| < | Less than | Left to right |
//| > | Greater than | Left to right |
//| <= | Less than or equal to | Left to right |
//| >= | Greater than or equal to | Left to right |
//| == | Equality | Left to right |
//| != | Inequality | Left to right |
//| & | Bitwise AND | Left to right |
//| ^ | Bitwise exclusive OR | Left to right |
//| | | Bitwise OR | Left to right |
//| && | Logical AND | Left to right |
//| || | Logical OR | Left to right |
//| e1?e2:e3 | Conditional | Right to left |
//| = | Assignment | Right to left |
//| *= | Multiplication assignment | Right to left |
//| /= | Division assignment | Right to left |
//| %= | Modulus assignment | Right to left |
//| += | Addition assignment | Right to left |
//| -= | Subtraction assignment | Right to left |
//| <<= | Left-shift assignment | Right to left |
//| >>= | Right-shift assignment | Right to left |
//| &= | Bitwise AND assignment | Right to left |
//| |= | Bitwise inclusive OR assignment | Right to left |
//| ^= | Bitwise exclusive OR assignment | Right to left |
//| , | Comma | Left to right |
//+------------------+-----------------------------------------+---------------+
该回答引用GPTᴼᴾᴱᴺᴬᴵ
这段 C 语言代码中的主函数会读取一个整数 n，然后会进行一个条件判断。如果 n 自增后小于 10，就会输出 n 的自增后的值，否则输出 n 的自减后的值。
具体的代码解析如下：
#include <stdio.h>
void main() {
int n;
scanf("%d", &n); // 从标准输入读取一个整数 n
if (n++ < 10) // 如果 n 自增后小于 10
printf("%d\n", n); // 输出 n 的自增后的值
else
printf("%d\n", n--); // 输出 n 的自减后的值
}
注意，main 函数的返回值应该是 int 类型，因此可以将函数声明修改为 int main()。同时，头文件应该用尖括号 < > 包裹，而不是方括号 [ ]。
- 可以查看手册：c语言-exp() 中的内容