差分和一維字首和
阿新 • • 發佈:2020-12-06
#include<stdio.h> #include<math.h> void solve(double a,double b,double c); int main() { double a,b,c; printf("Enter a,b,c:"); while(scanf("%lf%lf%lf",&a,&b,&c)!=EOF) { solve(a,b,c); printf("Enter a,b,c"); } return 0; } void solve(doublea,double b,double c) { double x1,x2; double delta,real,imag; if(a==0) printf("not quadratic equation.\n"); else { delta =b*b-4*a*c; if(delta>0) { x1=(-b+sqrt(delta))/(2*a); x2=(-b-sqrt(delta))/(2*a); printf("x1=%f,x2=%f\n",x1,x2); } else { real=-b/(2*a); imag=sqrt(-delta)/(2*a); printf("x1=%f+%fi,x2=%f-%fi\n",real,imag,real,imag); } } }
#include <stdio.h> long long fac(int n); int main() { int i,n; printf("Enter n: "); scanf("%d", &n); for(i=1;i<=n;++i) printf("%d!=%lld\n",i,fac(i)); return 0; } long long fac(int n) { static long long p=1; p = p*n; return p; }
#include<stdio.h> int func(int, int); int main() { int k=4,m=1,p1,p2; p1 = func(k,m); p2 = func(k,m) ; printf("%d,%d\n",p1,p2); return 0; } int func(int a,int b) { static int m=0,i=2; i += m+1; m = i+a+b; return (m); }
#include <stdio.h> #define N 1000 int fun(int n,int m,int bb[N]) { int i,j,k=0,flag; for(j=n;j<=m;j++) { flag=1; for(i=2;i<j;i++) if(j%i==0) { flag=0; break; } if(flag==1) bb[k++]=j; } return k; } int main(){ int n=0,m=0,i,k,bb[N]; scanf("%d",&n); scanf("%d",&m); for(i=0;i<m-n;i++) bb[i]=0; k=fun(n,m,bb); for(i=0;i<k;i++) printf("%4d",bb[i]); return 0; }
#include <stdio.h> long long fun(int n);// 函式宣告 int main() { int n; long long f; while(scanf("%d", &n) != EOF) {f = fun(n);//函式呼叫 printf("n = %d, f = %lld\n", n, f); } return 0; } long long fun(int n) { int i; if(n==0) i=0; else i=2*fun(n-1)+1; return i; }
#include <stdio.h> void draw(int n, char symbol); // 函式宣告 #include <stdio.h> int main() { int n, symbol; while(scanf("%d %c", &n, &symbol) != EOF) { draw(n, symbol); // 函式呼叫 printf("\n"); } return 0; } void draw(int n,char symbol) { int i,line; for(line=1;line<=n;line++) { for(i=1;i<=n-line;i++){ printf(" "); } for(i=1;i<=(2*line-1);i++) { printf("%c",symbol); } printf("\n"); } }