关于结构写入文件

#include <stdio.h>
#include <string.h>


/**
you are storing a char-pointer in the struct,
so memory for name should be allocated outside
the struct.
*/
typedef struct caption
{
    int length;
    char *name;
};




int main(int argc, char** argv)
{
    struct caption c[3];
    char names[3][128] =
    {
        "John Doe",
        "Jane M. Lequi",
        "Peter T. Campbell"
    };
    FILE* fp;
    const char* fname = "a.txt";
    int i;

    c[0].length = 1;
    c[0].name = names[0];
    c[1].length = 2;
    c[1].name = names[1];
    c[2].length = 3;
    c[2].name = names[2];

    fp = fopen(fname, "w");
    if(!fp)
    {
        // do something
    }

    for(i=0; i<3; ++i)
    {
        fprintf(fp, "%d %s\n", c[i].length, c[i].name);
    }

    fclose(fp);

    // check a.txt if you got the expected answer

    return 0;
}