1.32 換成數字23

# include<stdio.h> //編譯預處理指令 # include <math.h> # define pi 3.1415926 //定義不變常量 int convert(int num); char ABC(char a); double sum(double a,double b, double c); double area(double a,double b, double c); double num(double a,double b ,double c ); double interest_rate_current(double principal); double interest_rate_regular(double principal); double interest_rate_halfyear(double principal); int main(){ //定義主函數//假定本金為1000，求一年后的存款+利息double principal = 1000.00;double p1 = interest_rate_current(principal);double p2 = interest_rate_regular(principal);double p3 = interest_rate_halfyear(principal);printf("一年后活期存款為：%.2f,定期存款為：%.2f,半年存款為：%.2f \n",p1,p2,p3);// //錄入三個浮點數：// float a2,b2,c2;// printf("please input 3 :");// scanf(" %f,%f,%f",&a2,&b2,&c2);// printf( " %f, %f, %f",a2,b2 ,c2 );// double a1 = 3.67;// double b1= 5.22;// double c1 = 6.45;// printf("a = %f b = %f c = %f 周長是：%f \n",a1,b1,c1,sum(a1,b1,c1));// printf("a = %f b = %f c = %f 面積是：%f \n",a1,b1,c1,area(a1,b1,c1));// char c = 'B' ;// char d = ABC(c);// printf("小寫字母是: %c \n",d);// // int outnumber = convert(32);// // printf("結果是:%d \n",outnumber);} //計算利率，一年的活期利率為：0.0036，一年的定期利率：0.0225，半年的利率為0.0198 double interest_rate_current(double principal){double p1 = principal *(1+0.0036);return p1; } double interest_rate_regular(double principal){double p2 = principal * (1+0.0225);return p2; } double interest_rate_halfyear(double principal){double p3 = (principal * (1+ 0.0210/2))*(1 + 0.0210/2);return p3; }//對給定任意三角形的邊長，計算面積 double area(double a,double b, double c){double s = (a+b+c)/2;double areaThree = sqrt(s*(s-a)*(s-b)*(s-c));return areaThree; } //對給定任意三角形的邊長，計算周長 double sum(double a,double b, double c){double sumThree = a+b+c;return sumThree;} //對給的字母進行小寫轉換 char ABC(char a){char b = a+32;return b;} //對一個兩位的數字進行位置調換 int convert(int num){int num2 ;num2= num/10+((num%10)*10);return num2; }

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