# 严浩翔圈外女友

## 实验三

#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);
}

static变量特性：将保存上次结果

#include <stdio.h>

void printSymbol(int n, char symbol);

int main(){
int n;
char symbol;

while(scanf("%d %c", &n, &symbol) != EOF ){
printSymbol(n, symbol);
printf("\n");
}

return 0;

}

void printSymbol(int n,char symbol)
{

int i = 0;

for( i;i < n; i++)
printf("%c", symbol);
}

#include <stdio.h>

void printSymbol(int n, char symbol);

int main(){
int n;
char symbol;

while(scanf("%d %c", &n, &symbol) != EOF ){
printSymbol(n, symbol);
printf("\n");
}

return 0;

}

void printSymbol(int n,char symbol)
{
if(n == 1)
printf("%c", symbol);

else{
printSymbol(n-1, symbol);
printf("%c", symbol);

}
}

#include <stdio.h>
long long fun(int n);

int main()
{
int n;
long long f;

while(scanf("%d", &n)!= EOF)
{
f = fun(n);
printf("n = %d, f = %lld\n", n, f);
}

return 0;
}

long long fun(int n)
{

if(n==0)
return 0;

else if (n==1)
return 1;

else{
long long result;

result = 2 *fun(n-1) + 1;
return result;

}

}

#include <stdio.h>
#include <math.h>

int isPrime(int n);

int main(){
int i,m=0;
for(i=101;i<=200;i++)
{
if(isPrime(i)==0)
{printf("%4d",i);

m++;
}

}

printf("\n",i);
printf("101~200之间一共有%d个非素数",m);

return 0;

}

int isPrime(int n){
int m;
if (n<2)
return 0;

else{
for(m=2;m<=sqrt(n);m++)
if(n%m == 0)
break;

if(m > sqrt(n))
return 1;

else
return 0;
}
}

#include <stdio.h>
long fun(long s);

int main()
{
long s, t;
printf("Enter a number: ");
while (scanf("%ld", &s) != EOF)
{
t = fun(s);
printf("new number is: %ld\n\n", t);
printf("Enter a number: ");
}
return 0;
}

long fun(long s){
long m;
int t = 0,p = 1;
while(s>0){

m = s%10;
if(m%2==1){
t += m*p;
p = p*10;

}
s = s/10;
}
return t;
}

#include <stdio.h>
double fun(int n);

int main()
{
int n;
double s;

printf("Enter n(1~10): ");

while (scanf("%d", &n) != EOF)
{
s = fun(n);
printf("n = %d, s= %f\n\n", n, s);
printf("Enter n(1~10): ");
}

return 0;
}

double fun(int n)
{
int m = -1,t = 1,i;
double s=1;

if(n==1)
return 1;

else
{
for(i=2;i<=n;i++)
{
t*=i;
s+=(float)m/t;
m=-m;
}
return s;
}

} 

posted on 2021-11-29 21:24  严浩翔圈外女友  阅读(3)  评论(1编辑  收藏  举报