实验4
#include<stdio.h> const int N=4; int main(){ int a[N]={2,0,2,1}; char b[N]={'2','0','1','1'}; int i; printf("sizeof(int)=%d\n",sizeof(int)); printf("sizeof(char)=%d\n",sizeof(char)); printf("\n"); for(i=0;i<N;i++) printf("%x:%c\n",&b[i],b[i]); return 0;
1.2
#include <stdio.h> int main() { int a[2][3] = {{1, 2, 3}, {4, 5, 6}}; char b[2][3] = {{'1', '2', '3'}, {'4', '5', '6'}}; int i, j; for (i = 0; i < 2; ++i) for (j = 0; j < 3; ++j) printf("%x: %d\n", &a[i][j], a[i][j]); printf("\n"); for (i = 0; i < 2; ++i) for (j = 0; j < 3; ++j) printf("%x: %c\n", &b[i][j], b[i][j]); }
2
#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; }
3
#include <stdio.h> const int N = 5; int find_max(int x[], int n); void input(int x[], int n); void output(int x[], int n); int main() { int a[N]; int max; input(a, N); output(a, N); max = find_max(a, N); printf("max = %d\n", max); return 0; } void input(int x[], int n) { int i; for (i = 0; i < n; ++i) scanf("%d", &x[i]); } void output(int x[], int n) { int i; for (i = 0; i < n; ++i) printf("%d ", x[i]); printf("\n"); } int find_max(int x[], int n){ int i,max; max=x[0]; for(i=1;i<=n;i++) if(max<x[i]){ max=x[i]; } returm max;
}
#include <stdio.h> void dec2n(int x, int n); int main() { int x; printf("输入一个十进制整数: "); scanf("%d", &x); dec2n(x, 2); dec2n(x, 8); dec2n(x, 16); return 0; } // 函数定义 // 功能: 把十进制数x转换成n进制,打印输出 // 补足函数实现 void dec2n(int x, int n){ int a[100],i,b; b=x;i=1; if(n==2){ while(x!=0){ a[i++]=x%2; x=x/2; } for(i=i-1;i>0;i--) printf("%d",a[i]); printf("\n"); } if(n==8){ while(x!=0){ a[i++]=x%8;x=x/8; } for(i=i-1;i>0;i--) printf("%d",a[i]); printf("\n"); } if(n==16){ while(x!=0){ a[i++]=x%16;x=x/16; } for(i=i-1;i>0;i--){ if(a[i]<10) printf("%d",a[i]); if(a[i]>=10) switch(a[i]){ case 10:printf("%c",'A');break; case 11:printf("%c",'B');break; case 12:printf("%c",'C');break; case 13:printf("%c",'D');break; case 14:printf("%c",'E');break; case 15:printf("%c",'F');break; } } printf("\n"); } }
5.
#include<stdio.h> int main(){ int a,b,c,d; printf("n="); scanf("%d",&a); for(b=1;b<=a;b++) { for(c=1;c<=a;c++) { d=c>b?b:c; printf("%d",d); } printf("\n"); } return 0; }