C程序设计（第四版）谭浩强 - 课后习题答案 - 共11章 - xin

while ((s[i]=getchar())!='\\n') i++; p=&s[0];

while (*p!='\\n')

{if (('A'<=*p) && (*p<='Z')) ++upper;

else if (('a'<=*p) && (*p<='z')) ++lower; else if (*p==' ') ++space;

else if ((*p<='9') && (*p>='0')) ++digit; else

++other; p++; }

printf(\ lower case:%d\

printf(\ space:%d digit:%d other:%d\\n\return 0; } 8-9

#include int main()

{void move(int *pointer); int a[3][3],*p,i;

printf(\ for (i=0;i<3;i++)

scanf(\ p=&a[0][0]; move(p);

printf(\ for (i=0;i<3;i++)

printf(\ return 0; }

void move(int *pointer) {int i,j,t;

for (i=0;i<3;i++) for (j=i;j<3;j++)

{t=*(pointer+3*i+j);

*(pointer+3*i+j)=*(pointer+3*j+i); *(pointer+3*j+i)=t; } }

8-10-1

#include int main()

{void change(int *p); int a[5][5],*p,i,j;

printf(\ for (i=0;i<5;i++) for (j=0;j<5;j++)

scanf(\ p=&a[0][0]; change(p);

printf(\ for (i=0;i<5;i++) {for (j=0;j<5;j++)

printf(\ printf(\ }

return 0; }

void change(int *p) {int i,j,temp;

int *pmax,*pmin; pmax=p; pmin=p;

for (i=0;i<5;i++) for (j=i;j<5;j++)

{if (*pmax<*(p+5*i+j)) pmax=p+5*i+j; if (*pmin>*(p+5*i+j)) pmin=p+5*i+j; }

temp=*(p+12); *(p+12)=*pmax; *pmax=temp;

temp=*p; *p=*pmin; *pmin=temp; pmin=p+1;

for (i=0;i<5;i++) for (j=0;j<5;j++)

if (((p+5*i+j)!=p) && (*pmin>*(p+5*i+j))) pmin=p+5*i+j; temp=*pmin; *pmin=*(p+4); *(p+4)=temp; pmin=p+1;

for (i=0;i<5;i++) for (j=0;j<5;j++)

if (((p+5*i+j)!=(p+4))&&((p+5*i+j)!=p)&&(*pmin>*(p+5*i+j)))pmin=p+5*i+j; temp=*pmin; *pmin=*(p+20); *(p+20)=temp; pmin=p+1;

for (i=0;i<5;i++) for (j=0;j<5;j++)