/*從鍵盤上輸入浮點數(shù)x，設計函數(shù)實現(xiàn)y=2x*x+3x+6，在主函數(shù)中通過函數(shù)調(diào)用實現(xiàn)?

5y+3的值*/

#include <stdio.h>

float? fangcheng(float x)

{

float s;

s=2*x*x+3*x+6;

return s;

}?

int main()

{

float x;

printf("請輸入x的值：\n");

scanf("%f",&x);?

printf("%f",5*fangcheng(x)+3);

return 0;

}