c语言程序设计实例
时间: 2023-07-13 22:09:36 浏览: 46
以下是一些 C 语言程序设计实例:
1. 计算两个数的和
```
#include <stdio.h>
int main() {
int a, b, sum;
printf("Enter two numbers: ");
scanf("%d %d", &a, &b);
sum = a + b;
printf("Sum = %d", sum);
return 0;
}
```
2. 判断一个数是否为偶数
```
#include <stdio.h>
int main() {
int num;
printf("Enter a number: ");
scanf("%d", &num);
if(num % 2 == 0) {
printf("%d is even.", num);
} else {
printf("%d is odd.", num);
}
return 0;
}
```
3. 计算阶乘
```
#include <stdio.h>
int main() {
int num, fact = 1;
printf("Enter a number: ");
scanf("%d", &num);
for(int i = 1; i <= num; i++) {
fact *= i;
}
printf("Factorial of %d is %d", num, fact);
return 0;
}
```
4. 判断一个数是否为质数
```
#include <stdio.h>
int main() {
int num, flag = 0;
printf("Enter a number: ");
scanf("%d", &num);
for(int i = 2; i <= num/2; i++) {
if(num % i == 0) {
flag = 1;
break;
}
}
if(flag == 0) {
printf("%d is prime.", num);
} else {
printf("%d is not prime.", num);
}
return 0;
}
```
5. 打印九九乘法表
```
#include <stdio.h>
int main() {
for(int i = 1; i <= 9; i++) {
for(int j = 1; j <= i; j++) {
printf("%d*%d=%d\t", j, i, i*j);
}
printf("\n");
}
return 0;
}
```