(完整版)全国计算机等级考试二级教程--C语言程序设计课后习题答案

{

int iLoop = 0; while(str[iLoop]) {

putchar(str[iLoop++]); }

putchar('\\n'); return str; } 10.20 #include #include

int fun(char *str) { int len; int iLoop1; int iLoop2; int result = 1;

len = strlen(str);

for(iLoop1 = 0, iLoop2 = len - 1; iLoop1 < iLoop2; iLoop1++, iLoop2--) {

if(str[iLoop1] != str[iLoop2]) {

result = 0; break; } }

return result; }

int main() {

char a[20] = \ char b[20] = \

printf(\ printf(\

return 0; } 10.21

char fun(char *str, int pos) { int len; int iLoop; char ch;

len = strlen(str); if(pos > len) {

return NULL; }

ch = str[pos];

for(iLoop = pos; iLoop < len - 1; iLoop++) {

str[iLoop] = str[iLoop + 1]; }

str[len-1] = '\\0'; return ch; }

第十一章 一. 选择题

11.1 D 11.2 B 11.3 A 11.4 C

二. 填空题

11.5 IJKLEFGHABCD 11.6 7 11.7 8

11.8 *(s+j) i+1 i 11.9 17

11.10 (*fun)() (*fun)(a+i*h)/h mypoly

三. 编程题 11.11 #include #include #define N 81

int main(int argc, char **argv) { char sig; int dig; int pos;

char str[N] = {'\\0'}; char outStr[N] = {'\\0'};

if(argc < 2) { sig = '-'; dig = 10; } else {

sig = argv[1][0]; dig = argv[1][1] - '0'; }

printf(\请输入一个字符串：\ gets(str);

if(sig == '-') {

pos = strlen(str) - dig; if(pos <= 0) { pos = 0; }

strcpy(outStr, str + pos); }

else if(sig == '+') {

strcpy(outStr, str); pos = strlen(outStr); if(pos > dig) {

pos = dig; }

outStr[pos] = '\\0'; }

printf(\处理后的字串为：\ printf(\

return 0; } 11.12 #include #include

void movebin(char *bin) { int len; int iLoop; len = strlen(bin);

for(iLoop = len; iLoop > 0; iLoop--) {

bin[iLoop] = bin[iLoop - 1]; } return; }

void fun(int n, char *bin) { int pos;

pos = strlen(bin); if(n == 0) { return; }

if(n == 1) {

movebin(bin); bin[0] = '1'; return; }

movebin(bin); bin[0] = (n%2) + '0'; n /= 2; fun(n, bin); return; }

int main() { int a = 4;

char bin[50] = {\

fun(a, bin); printf(\

return 0; } 11.13