c - printf 数组中选定的数字

Question

在我的程序中，用户输入一个数组，PC 生成一个随机数组(从用户那里选择最大数量)，然后程序创建第三个数组，显示第一个数组中不在第二个数组中的数字。然而，我只想每次输入一次数字，但程序会一次又一次地输入它们，直到数组已满。

例如，如果我输入 0 3 1 并且生成的数字是 1 5 9，它将打印 0 3 3

我只想打印 0 3 。完整代码:

    #include <stdio.h>
#define N 7
void input(int ar1[N]);
void max(int* mx);
int input2(int ar2[N], int mx);
int input3(int ar3[N], int ar1[N], int ar2[N]);

int main()
{
    int ar1[N], mx, ar2[N], ar3[N], i;
    input(ar1);
    max(&mx);
    input2(ar2, mx);
    input3(ar3, ar1, ar2);
    printf("array1 = %d %d %d %d %d %d %d\n", ar1[0], ar1[1], ar1[2], ar1[3], ar1[4], ar1[5], ar1[6]);
    printf("array2 = %d %d %d %d %d %d %d\n", ar2[0], ar2[1], ar2[2], ar2[3], ar2[4], ar2[5], ar2[6]);
    printf("array3 = %d %d %d %d %d %d %d\n", ar3[0], ar3[1], ar3[2], ar3[3], ar3[4], ar3[5], ar3[6]);
}

void input(int ar1[N])
{
    int i;
    printf("Enter 7 numbers: ");
    for (i = 0; i < N; i++)
        scanf("%d", &ar1[i]);
}

void max(int* mx)
{
    printf("Enter random number bigger than 0 :- ");
    scanf("%d", mx);
    if (mx < 0)
    {
        printf("you have entered a number smaller than 0 please enter a number bigger than 0 :-");
        scanf("%d", mx);
    }
    return mx;
}

int input2(int ar2[N], int mx)
{
    int i;
    srand(time(0));
    for (i = 0; i < N; i++)
    {
        ar2[i] = 0 + rand() % (mx - 0 + 1);
        printf("%d ", ar2[i]);
    }
    return ar2;
}

int input3(int ar3[N], int ar1[N], int ar2[N])
{
    int i, j, a = 0;
    for (i = 0; i < N; i++)
    {
        if (ar1[i] != ar2[0] && ar1[i] != ar2[1] && ar1[i] != ar2[2] && ar1[i] != ar2[3] && ar1[i] != ar2[4] && ar1[i] != ar2[5] && ar1[i] != ar2[6])
            a = ar1[i];
        ar3[i] = a;
    }
    return ar3;
}

感谢您的帮助。

Answer 1

以下建议代码:

1. 处理问题评论中暴露的问题
2. 干净地编译
3. 添加了一些“适当的”水平间距以提高可读性

警告:我尚未验证 OP 发布的逻辑是否正确。

#include <stdio.h>
#include <stdlib.h>
#include <time.h>

#define N 7

// prototypes
void input ( int ar1[N] );
void max   ( unsigned* mx );
void input2( int ar2[N], int mx );
void input3( int ar3[N], int ar1[N], int ar2[N] );


int main( void )
{
    int ar1[N];
    int mx;
    int ar2[N];
    int ar3[N];

    srand( (unsigned)time(0) );

    input( ar1 );
    max( (unsigned*)&mx );

    input2( ar2, mx );

    input3( ar3, ar1, ar2 );

    printf( "array1 = %d %d %d %d %d %d %d\n",
            ar1[0], ar1[1], ar1[2], ar1[3], ar1[4], ar1[5], ar1[6] );
    printf( "array2 = %d %d %d %d %d %d %d\n",
            ar2[0], ar2[1], ar2[2], ar2[3], ar2[4], ar2[5], ar2[6] );
    printf( "array3 = %d %d %d %d %d %d %d\n",
            ar3[0], ar3[1], ar3[2], ar3[3], ar3[4], ar3[5], ar3[6] );
} // end function: main


void input( int ar1[N] )
{
    printf( "Enter 7 numbers: " );

    for ( size_t i = 0; i < N; i++ )
    {
        if( 1 != scanf("%d", &ar1[i]) )
        {
            perror( "scanf failed" );
            exit( EXIT_FAILURE );
        }
    }
} // end function: input


void max( unsigned* mx )
{
    printf("Enter random number bigger than 0 :- ");

    if( 1 != scanf("%u", mx) )
    {
        perror( "scanf failed" );
        exit( EXIT_FAILURE );
    }
} // end function: max


void input2( int ar2[N], int mx )
{
    for ( size_t i = 0; i < N; i++ )
    {
        ar2[i] = 0 + rand() % (mx - 0 + 1);
        printf("%d ", ar2[i]);
    }
} // end function: input2


void input3( int ar3[N], int ar1[N], int ar2[N] )
{
    int a = 0;

    for (size_t i = 0; i < N; i++)
    {
        if(    ar1[i] != ar2[0]
            && ar1[i] != ar2[1]
            && ar1[i] != ar2[2]
            && ar1[i] != ar2[3]
            && ar1[i] != ar2[4]
            && ar1[i] != ar2[5]
            && ar1[i] != ar2[6] )
            a = ar1[i];

        ar3[i] = a;
    }
} // end function: input3