【计算机二级C语言】卷004

标签：abc   定义变量   规格   sizeof   需要   拷贝   提高效率   自身   有关   

选择题

公共知识

【9】有三个关系R、S和T如下:
由关系R和S通过运算得到关系T, 则所使用的运算为()。

专业知识

【14】若有代数式子
(其中e仅代表自然对数的底数, 不是变量), 则以下能够正确表示该代数式的C语言表达式是()。

#include <stdio.h>
void main()
{
    int s, t, A = 10; double B = 6;
    s = sizeof(A); t = sizeof(B);
    printf("%d,%d\n", s, t);
}

#include <stdio.h>
void main()
{
    char  a, b, c, d;
    scanf("%c%c", &a, &b);
    c = getchar();
    d = getchar();
    printf("%c%c%c%c\n", a, b, c, d);
}

#include <stdio.h>
void main()
{
    int a = 0, b = 0, c = 0, d = 0;
    if (a = 1) b = 1; c = 2;
    else d = 3;
    printf("%d,%d,%d,%d\n", a, b, c, d);
}

#include <stdio.h>
void main()
{
    int x = 1, y = 0, a = 0, b = 0;
    switch (x)
    {
        case 1:
        switch (y)
        {
            case 0: a++; break;
            case 1: b++; break;
        }
        case 2: a++; b++; break;
        case 3: a++; b++;
    }
    printf("a=%d,b=%d\n", a, b);
}

#include <stdio.h>
int f(int x);
void main()
{
    int n = 1, m;
    m = f(f(f(n))); printf("%d\n", m);
}
int f(int x)
{ return x * 2; }

#include <stdio.h>
void fun(int a[], int n)
{
    int i, t;
    for (i = 0; i < n / 2; i++)
    { t = a[i]; a[i] = a[n - 1 - i]; a[n - 1 - i] = t; }
}
void main()
{
    int k[10] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 }, i;
    fun(k, 5);
    for (i = 2; i < 8; i++) printf("%d", k[i]);
    printf("\n");
}

#include <stdio.h>
#define N 4
void fun(int a[][N], int b[])
{
    int i;
    for (i = 0; i < N; i++) b[i] = a[i][i] - a[i][N - 1 - i];
}
void main()
{
    int x[N][N] = { {1, 2, 3, 4 }, { 5, 6, 7, 8 }, { 9, 10, 11, 12 }, { 13, 14, 15, 16 } }, y[N], i;
    fun(x, y);
    for (i = 0; i < N; i++) printf("%d,", y[i]);
    printf("\n");
}

#include <stdio.h>
#include < string.h>
void main()
{
    char str[][20] = {"One*World","One*Dream!"}, *p = str[1];
    printf("%d,", strlen(p));
    printf("%s\n", p);
}

#include <stdio.h>
void main()
{
    char s[] ="012xy\08s34f4w2";
    int i, n = 0;
    for (i = 0; s[i] != 0; i++)
    if (s[i] >= '0' && s[i] <= '9') n++;
    printf("%d\n", n);
}

#include <stdio.h>
fun(int x, int y)
{
    static int m = 0, i = 2;
    i += m + 1; m = i + x + y; return m;
}
void main()
{
    int j = 1, m = 1, k;
    k = fun(j, m); printf("%d,", k);
    k = fun(j, m); printf("%d\n", k);
}

#include <stdio.h>
typedef struct { int b, p; } A;
void f(A c) / * 注意: c是结构变量名*/
{
    int j;
    c.b += 1; c.p += 2;
}
void main()
{
    int i;
    A a = { 1, 2 };
    f(a);
    printf("%d,%d\n", a.b, a.p);
}

#include <stdio.h>
#include <stdlib.h>
int fun(int n)
{
    int *p;
    p = (int *) malloc(sizeof(int));
    *p = n;
    return * p;
}
void main()
{
    int a;
    a = fun(10);
    printf("%d\n", a + fun(10));
}

#include <stdio.h>
void main()
{
    unsigned char a = 8, c;
    c = a >> 3;
    printf("%d\n", c);
}

编程题

【计算机二级C语言】卷004

标签：abc   定义变量   规格   sizeof   需要   拷贝   提高效率   自身   有关   

原文地址：https://www.cnblogs.com/mjios/p/12446757.html