c语言第10次实验内容函数2邹显春

* #include void call(int, double, double);//使用函数前需要声明 double addition(double,double); double subtractor(double,double); double multiple(double,double); double division(double,double); void main() {int selet; double x,y; printf("请输入两个实数，之间用逗号隔开:\n"); scanf("%lf,%lf",&x,&y); while(1) { printf("%10s 简单计算器菜单\n"," "); printf("%10s 1-加法计算\n"," "); printf("%10s 2-加法计算\n"," "); printf("%10s 3-乘法计算\n"," "); printf("%10s 4-除法计算\n"," "); printf("%10s 5-退出计算\n"," "); printf("请输入选择(1/2/3/4/5)："); /* 输入提示*/ scanf("%d", &selet); if(selet>=1&&selet<5) call(selet,x,y); else {printf("退出计算!\n");break;} } } void call(int selet,double x,double y)//选择函数调用 {switch (selet) { case 1: printf("两个实数的和为:%.2f\n", addition(x,y));break;//调用函数不用再写出参数类型 case 2: printf("两个实数的差为:%.2f\n",subtractor(x,y));break; case 3: printf("两个实数的积为:%.2f\n", multiple(x,y));break; case 4: printf("两个实数的商为:%.2f\n", division(x,y)); } } double addition(double x,double y )//函数带返回值，就不能定义成void类型，必须对应返回值的类型 {return(x+y); } double subtractor(double x,double y) { return(x-y); } double multiple(double x,double y ) {return(x*y); } double division(double x,double y ) {return(x/y); } * * * * * #include int factorial(int); int sum(int); void main() { printf("1!+2!+3!+……+10!=%d\n",sum(10)); } int sum(int n) { int i; int result=0; for(i=1;i<=n;i++) result+=factorial(i); return result; } int factorial(int n) { int i; int result=1; for(i=1;i<=n;i++) result*=i; return result; } * #include int f(int);//求Fibonacci数列的函数 void main() { int i; printf("Fibonacci数列前40个数是：\n"); for(i=1;i<=40;i++) { printf("%-15d",f(i)); if(!(i%5))//格式控制，如果循环满5则打印一个换行符 printf("\n"); } } int f(int n) { if(n<=2) return 1; else return f(n-1)+f(n-2); } * #include unsigned digit(unsigned);//求一个正整数位数的函数 void main() { unsigned n;//使用无符号整型让接收的正整数尽可能的大 printf("请输入一个正整数，其值不超过4294967295：\n"); scanf("%u",&n);