1.数据库名：test；

表名：chengjibiao;

字段：Id  int , Name char , Englishint , Maths int , Physis int ;

2.存储过程：

DELIMITER $$

DROP PROCEDURE IF EXISTS `test`.`query` $$

CREATE DEFINER=`root`@`localhost` PROCEDURE `query`( in N int, out schar(254) )

BEGIN

declare a,b,c,d,e int;

declare f char(100);

declare g decimal(4,2);

set e=1;

drop table if exists zongping;

create table zongping(NUM int,Name char(255),English int,Mathsint,Physis int,Total int,aver decimal(4,2));

repeat

select English,Maths,Physis,Name into a,b,c,f from chengjibiaowhere Id=e;

set d=a+b+c;

set g=(a+b+c)/3;

insert into zongping(NUM,Name,English,Maths,Physis,Total,aver)values( e,f,a,b,c,d,g );

set e=e+1;

until e=N

end repeat;

select *from zongping as s;

drop table zongping;

END $$

DELIMITER ;

3.主函数(在文件main.c中)：

#include "stdio.h"

#include "stdlib.h"

#include "string.h"

#include "/usr/include/mysql/mysql.h"

#include "/usr/include/mysql/mysql_version.h"

#include "/usr/include/mysql/errmsg.h"

int main( int argc,char **argv[] )

{

MYSQL mysql;

MYSQL_ROW results,record;

char query[50],s[254];

/**链接数据库**/

if(!mysql_init(&mysql))

{

printf("mysql_init failed!/n");

return 0;

}

if(!mysql_real_connect(&mysql,"localhost","root","123456","test",0,NULL,CLIENT_MULTI_STATEMENTS))

{

printf("mysql_real_connect() failed!/n");

mysql_close(&mysql);

return 0;

}

/**调用存储过程**/

strcpy(query,"callquery(7,@s)");

mysql_real_query(&mysql,query,(unsigned int)strlen(query));

/**取得存储过程返回值**/

mysql_query(&mysql,"SELECT @s ");

results =mysql_store_result(&mysql);

/**输出返回值**/

printf( "Id      Name     Maths     English    Physis    Total     aver/n" );

while((record =mysql_fetch_row(results)))

{

printf("%1s%10s%8s%12s%11s%10s%10s/n", record[0], record[1],record[2],record[3],record[4],record[5],record[6]);

}

mysql_free_result(results);

mysql_close(&mysql);

return 0;

}

(编译：gcc -o main main.c -L/usr/lib/mysql/ -lmysqlclient -lz)

4.

成绩表：

+----+-------+-------+---------+--------+

| Id | Name| Maths | English |Physis |

+----+-------+-------+---------+--------+

|1 | liu |90|80 |86 |

|2 | zhang |88 |86 |87 |

|3 | xiao|78|88 |98 |

|4 | wang|77|87 |97 |

|5 | li|79 |89 |99 |

|6 | yi|67 |77 |87 |

运行程序得到的结果：

IdNameMathsEnglishPhysisTotalaver

1liu90808625685.33

2zhang88868726187.00

3xiao78889826488.00

4wang77879726187.00

5li79899926789.00

6yi67778723177.00