9.10 浮点数四舍五入.

9.10 浮点数四舍五入.
9.10 浮点数四舍五入
请编一个函数fun,功能是使实行数保留2位小数,并对第三位进行四舍五入.
预设代码
前置代码
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/* PRESET CODE BEGIN - NEVER TOUCH CODE BELOW */
#include
/* PRESET CODE END - NEVER TOUCH CODE ABOVE */
/* PRESET CODE BEGIN - NEVER TOUCH CODE BELOW */
#include
/* PRESET CODE END - NEVER TOUCH CODE ABOVE */
后置代码
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/* PRESET CODE BEGIN - NEVER TOUCH CODE BELOW */
int main( )
{ double a;
scanf ( "%lf",&a );
printf ( "%lf\n",fun ( a ) );
return 0;
}
/* PRESET CODE END - NEVER TOUCH CODE ABOVE */
/* PRESET CODE BEGIN - NEVER TOUCH CODE BELOW */
int main( )
{ double a;
scanf ( "%lf",&a );
printf ( "%lf\n",fun ( a ) );
return 0;
}
/* PRESET CODE END - NEVER TOUCH CODE ABOVE */