南航C语言课后习题07答案

1、习题习题 7 答案答案 1答案 #include int merge(int a,int b,int c,int m,int n) int i=0, j=0, k=0; while(im else ck+=bj+; while(im) ck+=ai+; while(jn) ck+=bj+; return k; main( ) int a=1,4,7,9, b=3,5,7,8,12,c20,i,k; k=merge(a,b,c,4,5); printf(array a:n); for(i=0;i4;i+) printf(%4d, ai); printf(n); printf(array b:n)

2、; for(i=0;i5;i+) printf(%4d, bi); printf(n); printf(merged array c:n); for(i=0;ik;i+) printf(%4d, ci); printf(n); 2答案 #include void count(int a,int b,int m) int i, k; for(i=0; i0) bk%10+; k=k/10; main( ) int a=23, 12, 40, 3, 8, 9, 34, 55, 66,b10=0,i; count(a,b,9); for(i=0;i10;i+) printf(%d:%dn, i, b

3、i); 3答案 #include int palin(int k) int i,j=0, a10; while(k0) aj+=k%10; k=k/10; for(i=0;ij;i+) if(ai!=aj-i-1) return 0; return 1; main( ) int k,x; printf(Please input an integer:n); scanf(%d, k=palin(x); if(k) printf(%d is palindrome.n, x); else printf(%d is not palindrome.n, x); 4答案 #include int isvo

4、wel(char c) if(c=a|c=e|c=i|c=o|c=u|c=A|c=E |c=I|c=O|c=U) return 1; else return 0; main( ) char s80; int i=0,sum=0; printf(Please input a string:n); scanf(%s, s); while(si) if(isvowel(si) sum+; i+; printf(the number of vowel:%dn, sum); 5答案 #include int DtoH(int n,int c) int i; for(i=0; n; i+) ci=n%16

5、; n/=16; return i-1; main( ) char h16=0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F; int c20,n,i; printf(Please input a decimal number:n); scanf(%d, i=DtoH(n,c); for(;i=0;i-) printf(%c, hci); printf(n); 6答案 #include void input(int a, int n) /*输入*/ int i; printf( Please input %d numbers:n, n); for(i=0; in; i+) sca

6、nf(%d, void sort(int a, int n) /*用选择法排序，升序*/ int i, j, t, k; for (i=0; in-1; i+) k=i; for (j=i+1; jn; j+) if(ajak) k=j; if(k!=i) t=ak; ak=ai; ai=t; void output( int a, int n ) /*输出*/ int i; for(i=0; in; i+) printf(%4d, ai); printf(n); main( ) int a50, n; printf(Please input n:n); scanf(%d, input(a,

7、n); sort(a, n); output(a, n); 7答案 #include int decom(int k,int a) int j=0; while(k0) aj+=k%10; k=k/10; return j-1; int combin(int a,int m) int i,s=0; for(i=0;i=m;i+) s=s*10+ai; return s; main( ) int k,x,a10; printf(Please input a position number:n); scanf(%d, k=decom(x,a); printf(the reverse of %d i

8、s %d:n, x, combin(a,k); 8答案 #include #include void josephu(int a ,int b ,int n,int m) int i,j,k=0,t; for(i=0;in;i+) ai=i+1; an=1; for(i=0;in;i+) for(j=0;jm;j+) t=k;k=ak; bi=k; at=ak; main( ) int n,m,a20,b20,i; printf(Please input n scanf(%d%d, josephu(a,b,n,m); printf(result:n); for(i=0;in;i+) print

9、f(%dt,bi); printf(n); 9答案 #include #define M 3 #define N 4 int q1=0, q2=0; int andian(int aMN, int p1, int p2) int i, j, k, m, f, w, max; w=0; for(i=0; ip1; i+) k=0; max=ai0; for(j=0; jmax) k=j; max=aij; for(m=0, f=1; mp1 m+) if(amkmax) f=0; if(f) w=1; q1=i; q2=k; return w; main( ) int aMN=1, 2, 3,

10、4, 4, 5, 3, 6, 3, 5, 6, 7;/*2,4,10,6,3,4,5,8,9,1,2,3;*/ int w; w=andian(a,3,4); if(w) printf(okni=%dnj=%dn%dn, q1, q2, aq1q2); else printf(non); 10答案 #include int sumarray(int a4,int m,int n) int i,j,sum1=0,sum2=0,sum; for(i=0;im;i+) for(j=0;jn;j+) sum1+=aij; for(i=1;im-1;i+) for(j=1;jn-1;j+) sum2+=

11、aij; sum=sum1-sum2; return sum; main( ) int a4=3,6,4,6,8,3,1,3,4,7,1,2,2,9,5,3,sum; sum=sumarray(a,4,4); printf(sum=%dn, sum); 11答案 #include stdio.h #define N 5 int sum(int aN) int i,s=0; for(i=0;iN;i+) s=s+aii+aiN-i-1; return(s); main( ) int i,j,s,aNN; for (i=0;iN;i+) for(j=0;jN;j+) scanf(%d, s=sum

12、(a); for(i=0;iN;i+) for(j=0;jN;j+) printf(%4d,aij); printf(out,n); printf(sum=%4dn,s); 12答案 #include #include #define MAX 20 void fillmatrix(int matrixMAX,int n) int i,j,count; i=0; j=n/2; for (count=1; countMAX) printf(n- ERROR - Order should be = %d, MAX); else if (order%2=0) printf(n- ERROR - Ord

13、er must be an odd integer); else fillmatrix(matrix, order); printf(nMagic Square of order %d :n, order); for (i=0; iorder; i+) for (j=0; jorder; j+) printf(%4d, matrixij); printf(n); 13答案 #include void my_strlwr(char str1) int i=0; while (str1i) if(str1i=A i+; main( ) char s80; printf(Please input a

14、 string:n); gets(s); printf(primary string:n); printf(%sn, s); my_strlwr(s); printf(changed:%sn, s); 14答案 #include #include void invert(char s ) int i,n; char c; n=strlen(s); for(i=0;in/2;i+) c=si; si=sn-i-1; sn-i-1=c; main( ) char s80; printf(Please input a string:n); gets(s); printf(primary string

15、:n); printf(%sn, s); invert(s); printf(reverse:n); printf(%sn, s); 15答案 #include int match(char s ,char p ) int i,j,k; for(i=0;si!=0;i+) for(j=i,k=0;sj!=0j+,k+); if(pk=0) return i; return -1; main( ) int k; char s180, s280; printf(Please input primary string:n); gets(s1); printf(Please input substri

16、ng:n); gets(s2); k=match(s1,s2); if(k!=-1) printf(%s is substring of %s. location:%dn, s2, s1, k+1); else printf(%s is not substring of %sn. , s2, s1); 16答案 #include /*/ #include #include int countthe(char s ) int i,count=0; for(i=0;si!=0;i+) if(si= ) if(tolower(si+1)=t return count; main( ) char s80; int count=0; printf(Please input a string,end by blank linen); gets(s); while(strcmp(s,) count+=countthe(s); printf(Please input a stringn); gets(s); print