12 lines
194 B
C
12 lines
194 B
C
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#include <stdio.h>
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#define PI 3.14
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int main()
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{
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float radiu;
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printf("半径(π=%.2f): ", PI);
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scanf("%f", &radiu);
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printf("面积: %.2f\n", PI * radiu * radiu);
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return 0;
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}
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