prog.c: In function 'main':
prog.c:6:2: warning: implicit declaration of function 'change' [-Wimplicit-function-declaration]
change(a,5);
^
prog.c:9:9: error: expected expression before 'int'
change(int *b,int n)
^
prog.c:10:2: error: expected ';' before '{' token
{
^