C - primer - plus（第五版）习题答案(4)

8 10 *** ====== ===== ==== === ==

10.mint;10;double;ii; 11.增加声明 int i, j;

第一个for循环 for(index = 1,i = 0;i< SIZE; index++,i++) 第二个for循环 for(i = 0;i< SIZE; i++)

printf(“%d ”,by_twos[i]);

12.函数应该把返回类型声明为long，并包含一个返回long值的return语句。 13.long squre(int num) { } 14.1:Hi! k = 1

k is 1 in the loop Now k is 3 k = 3

k is 3 in the loop Now k is 5 k = 5

k is 5 in the loop Now k is 7 k = 7 编程练习

1.#include #define N 26 int main(void) { }

2.#include

return 0; int letter[N]; int i; char a = 'a';

for(i = 0; i < N; i++)

letter[i] = a + i; printf(\,letter[i]); for(i = 0; i < N; i++) return ((long)num) * num;

int main(void) { }

3.#include

int main(void) { }

4.#include

int main(void) {

char ch;

printf(\); scanf(\,&ch); char a = 'A'; int i, j, k, l;

for(i = 0; i <= (ch - a); i++) {

for(j = 1; j <= (ch - a - i); j++)

printf(\); printf(\,a + l); printf(\,a+k); for(l = 0; l <= i; l++) for(k =i-1; k >= 0; k--) printf(\); char ch = 'F'; int i, j;

for(i = 0; i <= 5; i++) { } return 0;

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

printf(\,ch-j); printf(\); int i, j;

for(i = 1; i <= 5; i++) { } return 0;

for(j = 1; j<=i; j++)

printf(\); printf(\);

}

} return 0;

5.#include

int main(void) { }

6.#include #include

int main(void) { }

7.#include

int main(void) {

double x, y, z;

printf(\); while(2 == (scanf(\,&x,&y))) {

char word[20]; int i;

printf(\); scanf(\,word); printf(\);

for(i = strlen(word)-1; i >= 0; i--)

printf(\,word[i]); printf(\); return 0;

printf(\); for(i = min; i<=max; i++) { } return 0;

printf(\,i,i*i,i*i*i); printf(\); int min, max; int i;

printf(\); scanf(\,&min,&max);

printf(\,min,max);

}

}

z = (x-y) / (x*y);

printf(\,x,y,x,y,z); printf(\);

return 0;

8.#include

double f(double x, double y);

int main(void) { }

double f(double x, double y) { }

9.#include

int main(void) {

int max, min, sum; int i;

printf(\); scanf(\,&min,&max); while(max > min) {

sum = 0;

for(i = min; i <= max; i++)

sum += i*i;

printf(\,min*min,max*max,sum); printf(\); scanf(\,&min,&max); double z;

z = (x-y) / (x*y);

printf(\,x,y,x,y,z); return z; double x, y, z;

printf(\); while(2 == (scanf(\,&x,&y))) { } return 0;

f(x,y);

printf(\);

}

} return 0;

10.#include #define L 8

int main(void) { }

11.#include

int main(void) {

for(i = 1; i <= times; i++) { }

printf(\,sum1,sum2);

sum1 += 1.0 / i; sum2 += 1.0 / i * sign; sign = sign * (-1); double sum1 = 0; double sum2 = 0; int times, sign; int i; sign = 1;

printf(\); scanf(\,×); return 0; int Array[L]; int index;

printf(\,L); for(index = 0; index < L; index++)

scanf(\,&Array[index]); printf(\,L); for(index = 0; index < L; index++) printf(\,Array[index]); printf(\); printf(\);

for(index = L-1; index >= 0; index--) printf(\,Array[index]); printf(\);