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若有如下程序:#definePI3.1415926#defineA(r)2*PI*rmain(){floata,1;a=3.0;1=A(a) ;printf("r=%.
若有如下程序: #define PI 3.1415926 #define A(r) 2*PI*r main() {float a,1; a=3.0; 1=A(a) ; printf("r=%.2f,1=%.2f\n",a,1); } 则程序运行后的输出结果是()
A.r=3.00 1=18.85
B.3.00,18.85
C.r=3.000000 1=18.8495555
D.r=3.0 1=18.8495555
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