以下程序中的for循环执行的次数是( )。 #include "stdio.h" #define N 2 #define M N+1 #define NUM (M+1)*M/2 main() { int i,n=0; for(i=1;i<=NUM;i++) printf("\n"); } A. 5 B. 6 C. 8 D. 9
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