【计算机二级C语言】卷009

标签：sub   float   lower   算法   数据库系统   vc++   测试   基本   scan   

选择题

公共知识

【5】某系统总体结构图如下图所示:

该系统总体结构图的深度是()。

【9】有三个关系R、S和T如下:

则由关系R和S得到关系T的操作是()。

专业知识

【19】有以下计算公式

若程序前面已在命令行中包含math.h文件, 不能够正确计算上述公式的程序段是

#include <stdio.h>
void main()
{
    int y = 10;
    while (y--);
    printf("y=%d\n", y);
}

#include <stdio.h>
void main()
{
    int i;
    for (i = 1; i <= 40; i++)
    {
        if (i++ % 5 == 0)
        if (++i % 8 == 0) printf("%d ", i);
    }
    printf("\n");
}

#include <stdio.h>
void main()
{
    int s;
    scanf("%d", &s);
    while (s > 0)
    {
        switch (s)
        {
            case 1:
            printf("%d", s + 5);
            case 2:
            printf("%d", s + 4);
            break;
            case 3:
            printf("%d", s + 3);
            default: printf("%d", s + 1);
            break;
        }
        scanf("%d", &s);
    }
}

#include <stdio.h>
void fun(char *c, int d)
{
    *c = *c + 1;
    d = d + 1;
    printf("%c,%c,", *c, d);
}
void main()
{
    char b = 'a', a = 'A';
    fun(&b, a);
    printf("%c,%c\n", b, a);
}

#include <stdio.h>
void fun(int *w, int n)
{
    int i;
    for (i = 0; i < n; i++)
    {
        ______________
        printf("%d ", w[i]);
    }
    printf("\n");
}

#include <stdio.h>
void fun(char *c)
{
    while (*c)
    {
        if (*c >= 'a' && *c <= 'z')
        *c = *c - ('a' - 'A');
        c++;
    }
}
void main()
{
    char s[81];
    gets(s);
    fun(s);
    puts(s);
}

#include <stdio.h>
void main()
{
    int a[4][4] = {
        {1, 4, 3, 2 },
        { 8, 6, 5, 7 },
        { 3, 7, 2, 5 },
    { 4, 8, 6, 1 } };
    int i, j, k, t;
    for (i = 0; i < 4; i++)
    for (j = 0; j < 3; j++)
    for (k = j + 1; k < 4; k++)
    if (a[j][i] > a[k][i])
    {
        t = a[j][i]; a[j][i] = a[k][i]; a[k][i] = t;
    } / * 按列排序 */
    for (i = 0; i < 4; i++)
    printf("%d,", a[i][i]);
}

#include <stdio.h>
#include <string.h>
void main()
{
    char a[20] ="ABCD\0EFG\0", b[] ="IJK";
    strcat(a, b);
    printf("%s\n", a);
}

char name[20];
int num;
scanf("name=%s num=%d", name, &num);

#include <stdio.h>
void main()
{
    char ch[] ="uvwxyz", *pc;
    pc = ch;
    printf("%c\n", *(pc + 5));
}

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

#include <stdio.h>
int fun(int n)
{
    if (n == 1)
    return 1;
    else
    return (n + fun(n - 1));
}
void main()
{
    int x;
    scanf("%d", &x);
    x = fun(x);
    printf("%d\n", x);
}

#include <stdio.h>
int f(int m)
{
    static int n = 0;
    n+ = m;
    return n;
}
void main()
{
    int n = 0;
    printf("%d,", f(++n));
    printf("%d\n", f(n++));
}

typedef struct TT
{ char c; int a[4]; } CIN;

#include <stdio.h>
struct ord
{ int x, y; } dt[2] = { 1, 2, 3, 4 };
void main()
{
    struct ord * p = dt;
    printf("%d,", ++(p- > x));
    printf("%d\n", ++(p- > y));
}

#include <stdio.h>
#define SUB(A)(a) - (a)
void main()
{
    int a = 2, b = 3, c = 5, d;
    d = SUB(a + b) * c;
    printf("%d\n", d);
}

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

#include <stdio.h>
void main()
{
    FILE * fp;
    int a[10] = { 1, 2, 3, 0, 0 }, i;
    fp = fopen("d2.dat","wb");
    fwrite(a, sizeof(int), 5, fp);
    fwrite(a, sizeof(int), 5, fp);
    fclose(fp);
    fp = fopen("d2.dat","rb");
    fread(a, sizeof(int), 10, fp);
    fclose(fp);
    for (i = 0; i < 10; i++)
    printf("%d,", a[i]);
}

编程题

【计算机二级C语言】卷009

标签：sub   float   lower   算法   数据库系统   vc++   测试   基本   scan   

原文地址：https://www.cnblogs.com/mjios/p/12452736.html