[英]How do I pass a pointer to a struct from a library function back into my main.c program?
[英]How can I pass a struct and an int from an function and back to main? C
我試圖將數組person和quantity_persons_count返回到main(),但是我無法使其工作。 我試圖將void更改為int和person,但是該obv無效。
struct person{..}
int main(){
int o;
int quantity_persons_count = 0;
struct person persons[100];
while(1){
printf("1.Add a new person");
scanf("%i",&o);
switch(o)
{
case 1: AddPerson(persons,quantity_persons_count);
break;
}
void AddPerson(struct person *persons, int quantity_persons_count){
if(quantity_persons_count == 100){
printf("ERROR.\n");
}
else{
printf("name\n");
scanf("%s",persons[quantity_persons_count+1].name);
quantity_persons_count++;
printf("done\n");
}
}
如果你想改變quantity_persons_count
是在可見的main
,你需要一個指針傳遞給它:
void AddPerson(struct person *persons, int *quantity_persons_count){
if(*quantity_persons_count == 100){
printf("ERROR.\n");
}
else{
printf("name\n");
scanf("%s",persons[*quantity_persons_count+1].name);
(*quantity_persons_count)++;
printf("done\n");
}
}
然后,您可以這樣稱呼它:
AddPerson(persons,&quantity_persons_count);
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