阅读如下程序段,则程序段的执行后的输出结果为 #include "stdio.h" int main () { char c; int i; char count () ; int p ( char ) ; for ( i=0;i<30;i++ ) c=count () ; p ( c ) ; return 0; } char count () { char str=′A′; str+=1; return ( str ) ; } p ( char c ) { putchar ( c ) ; putchar ( ′ \ n′ ) ; }