Cassandra（Pycassa / CQL）返回部分匹配(Cassandra (Pycassa/CQL) Return Partial Match)

 如果您只是想解决问题，可以使用struct来封装数组： 
 
$ cat struct.c ; make CFLAGS=-Wall -Wextra struct ; ./struct
#include <stdio.h>

#define NX 2
#define NY 3

typedef struct fixed {
    float arr[NX][NY];
} fixed_t;

void array_printer( const fixed_t f)
{
    int i, j;
    for (i = 0; i < NX; i++ )
        for( j=0; j < NY; j++ )
            printf("Element [%d,%d]=%f\n", i,j, f.arr[i][j] );
}


int main(int argc, char *argv[]) {
    fixed_t f = {.arr={ {1,2,3}, {4,5,6} }};
    array_printer(f);
    return 0;
}

cc -Wall    struct.c   -o struct
Element [0,0]=1.000000
Element [0,1]=2.000000
Element [0,2]=3.000000
Element [1,0]=4.000000
Element [1,1]=5.000000
Element [1,2]=6.000000
 
 没有警告，没有错误，只是稍微f.arr[][]一点（例如）在array_printer使用（ f.arr[][]而不是arr[][] 。 
 
 如果修改struct fixed的struct fixed以包含NX和NY维度，则程序中甚至可以有多个不同大小的对象。 （虽然你稍微失去了编译时已知边界的好处，但我不确定你真正购买了多少。） 

If you just want the problem solved, you can use a struct to encapsulate your array:
 
$ cat struct.c ; make CFLAGS=-Wall -Wextra struct ; ./struct
#include <stdio.h>

#define NX 2
#define NY 3

typedef struct fixed {
    float arr[NX][NY];
} fixed_t;

void array_printer( const fixed_t f)
{
    int i, j;
    for (i = 0; i < NX; i++ )
        for( j=0; j < NY; j++ )
            printf("Element [%d,%d]=%f\n", i,j, f.arr[i][j] );
}


int main(int argc, char *argv[]) {
    fixed_t f = {.arr={ {1,2,3}, {4,5,6} }};
    array_printer(f);
    return 0;
}

cc -Wall    struct.c   -o struct
Element [0,0]=1.000000
Element [0,1]=2.000000
Element [0,2]=3.000000
Element [1,0]=4.000000
Element [1,1]=5.000000
Element [1,2]=6.000000
 
No warnings, no errors, and only slightly more annoying to use (f.arr[][] rather than arr[][] in the array_printer, for example).
 
If you amend the struct fixed to include the NX and NY dimensions, you could even have multiple different-sized objects in your program. (Though you'd slightly lose the benefits of compile-time-known bounds, I'm not sure how much that really buys you.)