Structure pointer variable passed as function parameter

Structural variables can be passed in their entirety as function parameters. Transfer process: All members are transferred one by one. Pointer variables are passed as function parameters. Then only the address is passed from the actual parameter to the formal parameter, thereby reducing the time and space overhead.

Programming using structure pointer variables as function parameters.

#include

#define STU struct stu

void ave(struct stu *ps);

STU //stu structure name

{

int num;

char *name;

char sex;

float score;

}boy[5]={

{101,"Zhou ping",'M',45},

{102,"Zhang ping",'M',62.5},

{103,"Liou fang",'F',92.5},

{104,"Cheng ling",'F',87},

{105,"Wang ming",'M',58},

}; //boy[5] is a structure array, which is of type stu. Assign an initial value to the structure array.

int main()

{

struct stu *ps; //ps structure pointer variable points to the first address of the boy[] structure array.

ps=boy;

ave(ps); //ps is used as an actual parameter to call the function ave to complete the calculation.

}

void ave(struct stu *ps)

{

int c=0,i;

float ave,s=0; //s total score, ave average score

for(i=0;i<5;i++,ps++) //ps++ cannot be dropped, otherwise it will loop 5 times in boy[1].

{

s+=ps->score;

if(ps->score<60)

c+=1; //cThe number of people who failed

}

printf("s=%fn",s);

ave=s/5;

printf("average=%fncount=%dn",ave,c);

}

The formal parameter is the pointer variable ps, boy is defined as an external structure array, and the entire source program is valid.