c语言之函数的调用示例.doc

. . . .#includeint x(int a,int b) /*应用函数 x()*/ int i; if(ab) i=a; else i=b; return i;int dx(int a,int b,int c,int d) int j; j=x(d,x(c,x(b,a); /*调用函数 x()*/ return j;void main() int a,b,c,d; scanf(%d %d %d %d,&a,&b,&c,&d); printf(max=%dn,dx(a,b,c,d); /*调用函数 dx()*/递归函数 f(1)=2;f(2)=3;f(n)=f(n-1)*f(n-2) 求f(n)的值；#includeint f(int n) int i; if(n=1) i=2; else if(n=2) i=3; else i=f(n-1)*f(n-2); return i;void main() int a; printf(please input data n); scanf(%d,&a); printf(%dn,f(a);/*编写一个函数： int f (int a) 功能：如果a0，则返回（1+2+3+a）的计算结果。在主函数中输入任意数n，以n为实参调用函数f，输出调用结果：返回值为-1则输出“错误”；否则输出“结果是：（该值）”。要求程序中包括：函数f的定义、原形声明以及调用。*/#includeint f(int a) int i,j=0; if(a=0) j=-1; else for(i=1;i=a;i+) j+=i; return j;void main() int n; printf(please input data n); scanf(%d,&n); if(f(n)=-1) printf(错误n); else printf(%dn,f(n);/*题目二：（必须熟悉）编写两个函数：int f1(int a) int f2(int a) 两个函数分别用来判断“完数” 和“素数”，如果是则返回1，不是则返回0。再编写两个函数：void f3(int a) void f4(int a)两个函数分别用来输出a以内的所有完数和素数，分别要调用f1和f2实现在主函数中要求用户输入两个正整数m和n，以m为参数调用f3，以n为参数调用f4，即可得到m以内的完数，n以内的素数。要求程序中不能出现因为缺少函数原形声明而出现的警告。*/#includeint f1(int a) int i,j=0; for(i=1;ia;i+) if(a%i=0) j+=i; if(j=a) return 1; else return 0;int f2(int a) int i,j=1; for(i=2;i=a/2;i+) if(a%i=0) j=0; return j;void f3(int a) int i,j=0; for(i=1;i=a;i+) if(f1(i) printf(%5d,i); j+; if(j%5=0) printf(n); void f4(int a) int i,j=0; for(i=1;i=a;i+) if(f2(i) printf(%5d,i); j+; if(j%5=0) printf(n); void main() int m,n; printf(please input data m and nn); scanf(%d,%d,&m,&n); f3(m); printf(n); f4(n); printf(n);#includevoid main() int a; int f(int n); printf(please input data n); scanf(%d,&a); printf(%dn,f(a);int f(int n) int j; if(n=1|n=2) j=1; else j=f(n-1)+f(n-2); return j;#include#includeint f(int x) int z; z=x*x+2*x+2; return z;void fu() printf(*n);void main() int a; char b10; for(;) printf(input the datan); fu(); scanf(%d,&a); a=f(a); printf(计算得%dn,a); fu(); printf(continue or not ); scanf(%s,b); if(strcmp(b,y)=0) continue; else break; #includevoid f(int a)a+;printf(这是第%d次使用该程序n,a);void main()int i;for(i=0;i6;i+)f(i);int srray20;#includevoid scan(int srray,int n)int i;printf(intput datan);for(i=0;in;i+)scanf(%d,&srrayi);void pai(int srray,int n)int i,j;int t;for(i=0;in;i+)for(j=0;jsrrayj+1)t=srrayj; srrayj=srrayj+1;srrayj+1=t;for(i=0;in;i+)printf(%d ,srrayi);void main()int n;printf(How many students?n);scanf(%d,&n);scan(srray,n);pai(srray,n);#includevoid yi(char x,char z) printf(%c-%cn,x,z);void yid(int a,char x,char y,char z) if(a=1) yi(x,z); else yid(a-1,x,z,y); yi(x,z); yid(a-1,y,x,z); void main() int n; printf(please input data n); scanf(%d,&n); yid(n,a,b,c);/递归函数；(计算n!)#includeint x(int a) int j; if(a=0|a=1) j=1; else j=x(a-1)*a; return j;void main() int n; printf(please input data n); scanf(%d,&n); printf(%dn,x(n);#includedouble f(int grade,int n)int i,sum=0;for(i=0;in;i+)sum=sum+gradei;return (sum/1.0/n);void main()int n1,i,n2;int grade120,grade220;printf(how many studentsn);scanf(%d,&n1); printf(input the graden); for(i=0;in1;i+)scanf(%d,&grade1i); printf(how many studentsn);scanf(%d,&n2); printf(input the graden); for(i=0;in2;i+)scanf(%d,&grade2i); printf(%5.2fn,f(grade1,n1);printf(%5.2fn,f(grade2,n2);int a=0;#includevoid f()a+;printf(这是第%d次使用该程序n,a);void main()int i;for(i=0;i6;i+)f();#includeint han(int i) int j; if(i=10) j=1; else j=2*han(i+1)+2; return j;void main() int a; printf(please input the dayn); scanf(%d,&a); printf(%dn,han(a);#includeint max(int x,int y) int z; if(xy) z=y; else z=x; return z;int f(int x,int y) int i; for(i=min(x,y);i-) if(x%i=0&y%i=0) break; return i;int fu(int x,int y) int i; for(i=max(x,y);i+) if(i%x=0&i%y=0) break; return i;void main() int x,y; printf(please input two numbern); scanf(%d,%d,&x,&y); printf(最大公约数为%dn,f(x,y);