下列程序的功能是：已知学生的记录由学号和三门学习成绩构成，N名学生的数据已有入 A数组中。找出各科及格的学生中总成绩最高的学生记录(假定最高成绩的记录中唯一的)，通过形参返回。

请考生编写函数mmm(STUa[]，STU*s)实现程序的要求，最后调用函数readwritedat()把结果输出到文件out.dat中。

例如：

KS01 87 60 88

KS09 97 59 99

KS11 67 67 60

则调用该函数后，输出

the top:KS01,87, 60, 88

include ＜stdio.h＞

include ＜string.h＞

define N 10

void readwritedat ();

typedef struct ss{

char num[10];

int s1, s2, s3;

}STU;

mmm(STU a[],STU *s)

{

}

main ( )

{

STU a[N]={

{ "01", 81, 93, 92},

{ "02", 89, 65, 91},

{ "03", 66, 55, 73},

{ "04", 87, 91, 99},

{ "05", 77, 65, 91},

{ "06", 90, 55, 73},

{ "07", 79, 65, 91},

{ "08", 61, 55, 73},

{ "09", 80, 93, 92},

{ "10", 71, 65, 91}

}m;

int i;

for (i=0; i＜N; i++ )

printf ("No=%s Mark=%d\n",a[i] .num, a[i] .s1,a[i] .s2,a[i].s3);

mmm (a, &m);

printf("the highest: %s,%d\n",m.num,m.s1+m.s2+m.s3);

readwritedat ( );

}

void readwritedat ( )

{

FILE *rf, *wf;

STU a[N] ,m;

int i;

rf=fopen ( "in. dat", "r" );

wf=fopen ( "out. dar", "w" );

for (i=0; i＜10; i++)

fscanf (rf, "%s%d%d%d", a [i] .hum, &a[i] .s1, &a[i] .s2, &a [i] .s3);

mmm(a, &m);

fprintf(wf,"the top: %s,%d,%d,%d\n",m.num,m.s1,m.s2,m.s3);

fclose (rf);

fclose (wf);

}