1：
#include
int main (void)
{
float num;
float res = 1;
printf ("Enter a positive integer: ");
scanf ("%f", &num);
for (int i = 1; i <= num; i++) {
res *= i;
}
printf ("Factorial of %f:%f", num, res);
return 0;
}
2：
#include
#define N 10
int main(void)
{
int y[N]={0};
long x;
printf("Enter a number:");
scanf("%ld",&x);
int i,q;
while(x>0){
i=x%10;
y[i]++;
x=x/10;
}
printf("Dight: ");
for(q=0;q<N;q++){
printf("%2d",q);
}
printf("\n");
printf("Occurrences: ");
for(q=0;q<N;q++){
printf("%2d",y[q]);
}
return 0;
}
3：
#include
#define N 10
int main(void){
long x;
do{
printf("Enter a number:");
scanf("%ld",&x);
if(x<=0)break;
int y[N]={0};
int i;
while(x>0){
i=x%10;
y[i]++;
x=x/10;
}
printf("Repeated digit(s):");
for(i=0;i<N;i++){
if(y[9]<=1&&y[8]<=1&&y[7]<=1&&y[6]<=1&&y[5]<=1&&y[4]<=1&&y[3]<=1&&y[2]<=1&&y[1]<=1){printf("没有重复的\n");break;}
else{printf("有重复的\n");break;}
}
}while(1);
return 0;
}
4：
#include
#define N 10
int main(void){
long x;
do{
printf("Enter a number:");
scanf("%ld",&x);
if(x<=0)break;
int y[N]={0};
int i;
while(x>0){
i=x%10;
y[i]++;
x=x/10;
}
printf("Repeated digit(s):");
for(i=0;i<N;i++){
if(y[9]<=1&&y[8]<=1&&y[7]<=1&&y[6]<=1&&y[5]<=1&&y[4]<=1&&y[3]<=1&&y[2]<=1&&y[1]<=1){printf("没有重复的\n");break;}
else{printf("有重复的\n");break;}
}
}while(1);
return 0;
}
5：
#include
#define N 10
int main(void){
long x;
do{
printf("Enter a number:");
scanf("%ld",&x);
if(x<=0)break;
int y[N]={0};
int i;
while(x>0){
i=x%10;
y[i]++;
x=x/10;
}
printf("Repeated digit(s):");
for(i=0;i<N;i++){
if(y[9]<=1&&y[8]<=1&&y[7]<=1&&y[6]<=1&&y[5]<=1&&y[4]<=1&&y[3]<=1&&y[2]<=1&&y[1]<=1){printf("没有重复的\n");break;}
else{printf("有重复的\n");break;}
}
}while(1);
return 0;
}
6：
#include
#include
#define N 100
int main(void)
{
char ch[N];
int i=-1;
printf ("Enter message: ");
do{
i++;
ch[i]=getchar();
i++;
}while(ch[--i]!='\n');
printf("In B1FF-speak：");
for(int q=0;q<i;q++){
ch[q]=toupper(ch[q]);
switch(ch[q])
{
case 'A': printf ("4"); break;
case 'B': printf ("8"); break;
case 'E': printf ("3"); break;
case 'I': printf ("1"); break;
case 'O': printf ("0"); break;
case 'S': printf ("5"); break;
default : printf ("%c", ch[q]); break;
}
}
printf ("!!!!!!!!!!");
return 0;
}
7：
#include
#define N 5
int main(void)
{
int a[N][N] = {0};
int i, j;
for (i = 0; i < N; i++) {
printf("Enter row %d: ", i + 1);
for (j = 0; j < N; j++) {
scanf("%d", &a[i][j]);
}
}
int sum=0;
printf("Row totals: ");
for (i = 0; i < N; i++) {
for (j = 0; j < N; j++) {
sum+=a[i][j];
}
printf("%d ", sum);
sum = 0;
}
printf("\nColumn totals: ");
for (j = 0; j < N; j++) {
for (i = 0; i < N; i++) {
sum += a[i][j];
}
printf("%d ", sum);
sum = 0;
}
return 0;
}
8：
#include
#define N 5
int main(void)
{
int a[N][N] = {0};
int i, j;
for (i = 0; i < N; i++) {
printf("学生 %d: ", i + 1);
for (j = 0; j < N; j++) {
scanf("%d", &a[i][j]);
}
}
int sum1=0;
int max=0,min=0;
int sum2=0;
int q=0;
for(i=0;i<N;i++){
printf("学生 %d: \n", i + 1);
for( q=0;q<N;q++){
sum1+=a[i][q];}
printf("平均分:%d\n",sum1/N);
printf("总分分:%d\n",sum1);
sum1=0;}
for(i=0;i<N;i++){
min=a[0][i];
for(q=0;q<N;q++){
sum2+=a[q][i];
if(a[q][i]>max){
max=a[q][i];}
if(a[q][i]<min){
min=a[q][i];}
}
printf("第%d门平均分:%.2f\n",i+1,(double)sum2/N);
printf("第%d最高分=%d\n",i+1,max);
printf("第%d最低分=%d\n",i+1,min);}
return 0;
}
9:
#include
#define N 5
int main(void)
{
int a[N][N] = {0};
int i, j;
for (i = 0; i < N; i++) {
printf("学生 %d: ", i + 1);
for (j = 0; j < N; j++) {
scanf("%d", &a[i][j]);
}
}
int sum1=0;
int max=0,min=0;
int sum2=0;
int q=0;
for(i=0;i<N;i++){
printf("学生 %d: \n", i + 1);
for( q=0;q<N;q++){
sum1+=a[i][q];}
printf("平均分:%d\n",sum1/N);
printf("总分分:%d\n",sum1);
sum1=0;}
for(i=0;i<N;i++){
min=a[0][i];
for(q=0;q<N;q++){
sum2+=a[q][i];
if(a[q][i]>max){
max=a[q][i];}
if(a[q][i]<min){
min=a[q][i];}
}
printf("第%d门平均分:%.2f\n",i+1,(double)sum2/N);
printf("第%d最高分=%d\n",i+1,max);
printf("第%d最低分=%d\n",i+1,min);}
return 0;
}
10:
#include
#include
int main(void)
{
const int lea[8] = {480, 583, 679, 767, 840, 945, 1140, 1305};
const int arr[8] = {616, 712, 811, 900, 968, 1075, 1280, 1438};
int hours, minutes;
int time;
printf ("Enter a 24-hour time:");
scanf ("%d:%d", &hours, &minutes);
time = hours * 60 + minutes;
int mix = 1440, m;
for (int i = 0; i < 8; i++) {
if (abs(lea[i] - time) < mix) {
mix = abs(lea[i] - time);
m = i;
}
}
if (lea[m] / 60 > 12) {
if (arr[m] / 60 > 12) {
printf("CLosest departure time is %d:%.2d p.m.", lea[m] / 60 - 12, lea[m] % 60);
printf(", arriving at %d:%.2d p.m.", arr[m] / 60 -12, arr[m] % 60);
}
} else {
if (arr[m] / 60 > 12) {
printf("CLosest departure time is %d:%.2d a.m.", lea[m] / 60, lea[m] % 60);
printf(", arriving at %d:%.2d p.m.", arr[m] / 60 -12, arr[m] % 60);
} else {
printf("CLosest departure time is %d:%.2d a.m.", lea[m] / 60, lea[m] % 60);
printf(", arriving at %d:%.2d p.m.", arr[m] / 60, arr[m] % 60);
}
}
return 0;
}
11:
#include
#include
#define N 15
int main(void)
{
char ch[N];
int i;
printf("Enter phone number:");
for( i=0;i<N;i++){
ch[i]=getchar();
if(ch[i]=='\n')break;
}
printf("In numeric form:");
for(int q=0;q<=i;q++){
ch[q]=toupper(ch[q]);
if (ch[q]<= 'Z' && ch[q] >= 'A'){
switch (ch[q]) {
case 65: case 66: case 67:
printf ("2");
break;
case 68: case 69: case 70:
printf ("3");
break;
case 71: case 72: case 73:
printf ("4");
break;
case 74: case 75: case 76:
printf ("5");
break;
case 77: case 78: case 79:
printf ("6");
break;
case 81: case 82: case 83: case 80:
printf ("7");
break;
case 84: case 85: case 86: case 87:
printf ("8");
break;
case 88: case 89: case 90:
printf ("9");
break;
}continue;}
printf("%c",ch[q]);}
return 0;
}
12:
#include
#include
#define N 15
int main(void)
{
char ch[N];
int i;
printf("Enter phone number:");
for( i=0;i<N;i++){
ch[i]=getchar();
if(ch[i]=='\n')break;
}
printf("In numeric form:");
for(int q=0;q<=i;q++){
ch[q]=toupper(ch[q]);
if (ch[q]<= 'Z' && ch[q] >= 'A'){
switch (ch[q]) {
case 65: case 66: case 67:
printf ("2");
break;
case 68: case 69: case 70:
printf ("3");
break;
case 71: case 72: case 73:
printf ("4");
break;
case 74: case 75: case 76:
printf ("5");
break;
case 77: case 78: case 79:
printf ("6");
break;
case 81: case 82: case 83: case 80:
printf ("7");
break;
case 84: case 85: case 86: case 87:
printf ("8");
break;
case 88: case 89: case 90:
printf ("9");
break;
}continue;}
printf("%c",ch[q]);}
return 0;
}
13:
#include
int main(void)
{
char ch[20];
int i,e;
printf("Enter a first and last name:");
for( i=0;i<20;i++){
ch[i]=getchar();
if(65<ch[i]&&ch[i]<90)
e=i;
if(ch[i]=='\n')
break;
}
printf("You enered the name:");
for(;e<i;e++){
if(ch[e]!=' ')
printf("%c",ch[e]);
continue;}
printf(", ");
for(int q=0;q<=i;q++){
if(ch[q]!=' '){
printf("%c",ch[q]);
break;}
continue;}
return 0;
}
14:
#include
int main(void)
{
char ch,a[100];
printf("Enter a sentence:");
int i,e,t=0;
int q;
for( i=0;i<100;i++){
a[i]=getchar();
if(a[i]=='?'||a[i]=='!'||a[i]=='.'){
ch=a[i];
}
if(a[i]=='\n')
break;
}
printf("Reversal of sentence:");
for( q=i-2;;){
if(a[q]!=' '){
t++;
q--;}
if(a[q]==' '){
e=q;
for(;(e+1)<=(q+t);e++){
printf("%c",a[e+1]);
}printf(" ");
q--;
t=0;
}
if(q==0)
{
for(int y=0;y<=t;y++){
printf("%c",a[y]);
}
break;
}
}
printf("%c",ch);
return 0;
}
15:
#include
int main(void)
{
char sen[80], sen1[80];
int n;
int i;
printf("Enter message to be encrypted: ");
for (i = 0; ; i++) {
sen[i] = getchar();
if (sen[i] == '\n') break;
}
printf("Enter shift amout (1~25): ");
scanf("%d", &n);
printf("Encrypted message: ");
for (int j = 0; j < i + 1; j++) {
if (sen[j] <= 'z' && sen[j] >= 'a') {
printf("%c", ((sen[j] - 'a') + n) % 26 + 'a');
} else if (sen[j] <= 'Z' && sen[j] >= 'A') {
printf("%c", ((sen[j] - 'A') + n) % 26 + 'A');
} else {
printf("%c", sen[j]);
}
}
return 0;
}
16:
#include
#include
int main(void)
{
char a[100];
char ch[26]={0};
int i,e;
char b[100];
printf("Enter first word:");
for(i=0;i<100;i++){
a[i]=getchar();
a[i]=tolower(a[i]);
if(a[i]=='\n')break;
if(isalpha(a[i])!=0){
e=a[i]-'a';
ch[e]++;
}
}
printf("Enter second word:");
for(i=0;i<100;i++){
b[i]=getchar();
b[i]=tolower(b[i]);
if(b[i]=='\n')break;
if(isalpha(b[i])!=0){
e=b[i]-'a';
ch[e]--;
}
}
for(i=0;i<26;i++){
if(ch[i]!=0){
printf("The words are no anagrams\n");
break;}
if(i==25)
{
if(ch[i]==0){
printf("The words are anagrams\n");break;}
else {
continue;
}
}}
return 0;
}
17:
#include
#include
int main(void)
{
char a[100];
char ch[26]={0};
int i,e;
char b[100];
printf("Enter first word:");
for(i=0;i<100;i++){
a[i]=getchar();
a[i]=tolower(a[i]);
if(a[i]=='\n')break;
if(isalpha(a[i])!=0){
e=a[i]-'a';
ch[e]++;
}
}
printf("Enter second word:");
for(i=0;i<100;i++){
b[i]=getchar();
b[i]=tolower(b[i]);
if(b[i]=='\n')break;
if(isalpha(b[i])!=0){
e=b[i]-'a';
ch[e]--;
}
}
for(i=0;i<26;i++){
if(ch[i]!=0){
printf("The words are no anagrams\n");
break;}
if(i==25)
{
if(ch[i]==0){
printf("The words are anagrams\n");break;}
else {
continue;
}
}}
return 0;
}
