C语言代码运行不出来，要求用函数指针。

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

typedef struct
{
    char color;
    char num;
    float key;
}STR;

int main()
{
    int i,j;
    STR a[19]={{"桃","K",0.0},{"方","3",0.0},{"梅","8",0.0},{"杏","10",0.0},{"梅","2",0.0},{"杏","4",0.0},{"桃","7",0.0},{"方","10",0.0},{"桃","J",0.0},
    {"桃","5",0.0},{"桃","8",0.0},{"杏","9",0.0},{"方","4",0.0},{"梅","2",0.0},{"桃","6",0.0},{"杏","Q",0.0},{"梅","K",0.0},{"方","A",0.0},{"梅","Q",0.0}};
    /*void(*k2)(STR);
    void(*k1)(STR);
    void(*f)(STR);*/
    key1(a);
    fun(a);
    printf("花色：\t");
    for(i=0;i<19;i+2)
    {
        printf("%s\t",a[i].color);
    }
    printf("点数：\t");
    for(i=1;i<19;i+2)
    {
        printf("%s\t",a[i].num);
    }
    return 0;
}
float key2(STR a)
{
    if(a.num=='A')
        a.key+=0.01;
    else if(a.num=='2')
        a.key+=0.02;
    else if(a.num=='3')
        a.key+=0.03;
    else if(a.num=='4')
        a.key+=0.04;
    else if(a.num=='5')
        a.key+=0.05;
    else if(a.num=='6')
        a.key+=0.06;
    else if(a.num=='7')
        a.key+=0.07;
    else if(a.num=='8')
        a.key+=0.08;
    else if(a.num=='9')
        a.key+=0.09;
    else if(a.num=='10')
        a.key+=0.10;
    else if(a.num=='J')
        a.key+=0.11;
    else if(a.num=='Q')
        a.key+=0.12;
    else
        a.key+=0.13;
    return a.key;
}
void key1(STR *a)
{
    int i;
    for(i=1;i<19;i++)
    {
        if(a[i].color=='桃')
        {
            a[i].key=key2(a[i])+1;
        }
        if(a[i].color=='方')
        {
            a[i].key=key2(a[i])+2;
        }
        if(a[i].color=='梅')
        {
            a[i].key=key2(a[i])+3;
        }
        if(a[i].color=='杏')
        {
            a[i].key=key2(a[i])+4;
        }
    }
}
void fun(STR *a)
{
    int i,j;
    STR t;
    for(j=0;j<19;j++)
    {
        if(a[j].key<a[j+1].key)
        {
            t=a[j];
            a[j]=a[j+1];
            a[j+1]=t;
        }
    }
}

color和num应该是数组
char color[5];
char num[5];
字符串比较应该用
if(strcmp(a.num,"A")==0)
排序也少了一层外循环
你题目的解答代码如下：

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

typedef struct
{
    char color[5];
    char num[5];
    float key;
}STR;

float key2(STR a)
{
    if(strcmp(a.num,"A")==0)
        a.key+=0.01;
    else if(strcmp(a.num,"2")==0)
        a.key+=0.02;
    else if(strcmp(a.num,"3")==0)
        a.key+=0.03;
    else if(strcmp(a.num,"4")==0)
        a.key+=0.04;
    else if(strcmp(a.num,"5")==0)
        a.key+=0.05;
    else if(strcmp(a.num,"6")==0)
        a.key+=0.06;
    else if(strcmp(a.num,"7")==0)
        a.key+=0.07;
    else if(strcmp(a.num,"8")==0)
        a.key+=0.08;
    else if(strcmp(a.num,"9")==0)
        a.key+=0.09;
    else if(strcmp(a.num,"10")==0)
        a.key+=0.10;
    else if(strcmp(a.num,"J")==0)
        a.key+=0.11;
    else if(strcmp(a.num,"Q")==0)
        a.key+=0.12;
    else
        a.key+=0.13;
    return a.key;
}
void key1(STR *a)
{
    int i;
    for(i=0;i<19;i++)
    {
        if(strcmp(a[i].color,"桃")==0)
        {
            a[i].key=key2(a[i])+1;
        }
        if(strcmp(a[i].color,"方")==0)
        {
            a[i].key=key2(a[i])+2;
        }
        if(strcmp(a[i].color,"梅")==0)
        {
            a[i].key=key2(a[i])+3;
        }
        if(strcmp(a[i].color,"杏")==0)
        {
            a[i].key=key2(a[i])+4;
        }
    }
}
void fun(STR *a)
{
    int i,j;
    STR t;
    for(i=0;i<19;i++)
    {
        for(j=0;j<19-i-1;j++)
        {
            if(a[j].key<a[j+1].key)
            {
                t=a[j];
                a[j]=a[j+1];
                a[j+1]=t;
            }
        }
    }
}

int main()
{
    int i,j;
    STR a[19]={{"桃","K",0.0},{"方","3",0.0},{"梅","8",0.0},{"杏","10",0.0},{"梅","2",0.0},{"杏","4",0.0},{"桃","7",0.0},{"方","10",0.0},{"桃","J",0.0},
    {"桃","5",0.0},{"桃","8",0.0},{"杏","9",0.0},{"方","4",0.0},{"梅","2",0.0},{"桃","6",0.0},{"杏","Q",0.0},{"梅","K",0.0},{"方","A",0.0},{"梅","Q",0.0}};
    /*void(*k2)(STR);
    void(*k1)(STR);
    void(*f)(STR);*/
    key1(a);
    fun(a);
    printf("花色：\t");
    for(i=0;i<19;i++)
    {
        printf("%s\t",a[i].color);
    }
    printf("\n点数：\t");
    for(i=0;i<19;i++)
    {
        printf("%s\t",a[i].num);
    }
    printf("\n整合：\t");
    for(i=0;i<19;i++)
    {
        printf("%s%s\t",a[i].color,a[i].num);
    }
    return 0;
}

如有帮助，请点击我的回答下方的【采纳该答案】按钮帮忙采纳下，谢谢!