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Lỗi biên dịch:

Main.c:2:12: error: expected ‘;’, ‘,’ or ‘)’ before ‘&’ token
 void A(int &n){
            ^
Main.c:18:30: error: expected ‘;’, ‘,’ or ‘)’ before ‘&’ token
 void max(int a[], int n, int &mx){
                              ^
Main.c:27:28: error: expected ‘;’, ‘,’ or ‘)’ before ‘&’ token
 void min(int a[],int n,int &mn){
                            ^
Main.c: In function ‘main’:
Main.c:42:5: warning: implicit declaration of function ‘A’ [-Wimplicit-function-declaration]
     A(n);
     ^
Main.c:44:5: warning: implicit declaration of function ‘max’; did you mean ‘main’? [-Wimplicit-function-declaration]
     max(a,n,mx);
     ^~~
     main
Main.c:45:5: warning: implicit declaration of function ‘min’; did you mean ‘main’? [-Wimplicit-function-declaration]
     min(a,n,mn);
     ^~~
     main
Main.c: In function ‘B’:
Main.c:15:9: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d",&a[i]);
         ^~~~~~~~~~~~~~~~~