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C语言在办理数学题目方面非常有效，因为它提供了丰富的数学函数和运算符。以下是一些经典的C语言数学题，这些题目可以帮助你提高编程和数学能力。
1. 盘算圆的面积
给定圆的半径，盘算圆的面积。
- #include <stdio.h>
- #include <math.h>
- int main() {
- double radius, area;
- printf("Enter the radius of the circle: ");
- scanf("%lf", &radius);
- area = M_PI * radius * radius;
- printf("The area of the circle is: %.2lf\n", area);
- return 0;
- }
给定一个非负整数，盘算其阶乘。
- #include <stdio.h>
- int factorial(int n) {
- if (n == 0) return 1;
- return n * factorial(n - 1);
- }
- int main() {
- int n;
- printf("Enter a non-negative integer: ");
- scanf("%d", &n);
- printf("The factorial of %d is: %d\n", n, factorial(n));
- return 0;
- }
给定一个正整数N，盘算斐波那契数列的第N项。
- #include <stdio.h>
- int fibonacci(int n) {
- if (n <= 1) return n;
- return fibonacci(n - 1) + fibonacci(n - 2);
- }
- int main() {
- int n;
- printf("Enter a positive integer: ");
- scanf("%d", &n);
- printf("The %dth term of the Fibonacci sequence is: %d\n", n, fibonacci(n));
- return 0;
- }
给定一个正整数，判断其是否为素数。
- #include <stdio.h>
- #include <math.h>
- int isPrime(int n) {
- if (n <= 1) return 0;
- for (int i = 2; i <= sqrt(n); i++) {
- if (n % i == 0) return 0;
- }
- return 1;
- }
- int main() {
- int n;
- printf("Enter a positive integer: ");
- scanf("%d", &n);
- if (isPrime(n)) {
- printf("%d is a prime number.\n", n);
- } else {
- printf("%d is not a prime number.\n", n);
- }
- return 0;
- }
给定两个正整数，盘算它们的最大公约数。
- #include <stdio.h>
- int gcd(int a, int b) {
- while (b != 0) {
- int temp = b;
- b = a % b;
- a = temp;
- }
- return a;
- }
- int main() {
- int a, b;
- printf("Enter two positive integers: ");
- scanf("%d %d", &a, &b);
- printf("The GCD of %d and %d is: %d\n", a, b, gcd(a, b));
- return 0;
- }
给定两个正整数，盘算它们的最小公倍数。
- #include <stdio.h>
- int gcd(int a, int b) {
- while (b != 0) {
- int temp = b;
- b = a % b;
- a = temp;
- }
- return a;
- }
- int lcm(int a, int b) {
- return a * b / gcd(a, b);
- }
- int main() {
- int a, b;
- printf("Enter two positive integers: ");
- scanf("%d %d", &a, &b);
- printf("The LCM of %d and %d is: %d\n", a, b, lcm(a, b));
- return 0;
- }
给定底数和指数，盘算幂。
- #include <stdio.h>
- #include <math.h>
- int main() {
- double base, exponent, result;
- printf("Enter the base and exponent: ");
- scanf("%lf %lf", &base, &exponent);
- result = pow(base, exponent);
- printf("The result of %.2lf raised to the power of %.2lf is: %.2lf\n", base, exponent, result);
- return 0;
- }
给定一个非负数，盘算其平方根。
- #include <stdio.h>
- #include <math.h>
- int main() {
- double number, result;
- printf("Enter a non-negative number: ");
- scanf("%lf", &number);
- result = sqrt(number);
- printf("The square root of %.2lf is: %.2lf\n", number, result);
- return 0;
- }
给定角度（以度为单位），盘算其正弦、余弦和正切值。
- #include <stdio.h>
- #include <math.h>
- int main() {
- double angle, sine, cosine, tangent;
- printf("Enter the angle in degrees: ");
- scanf("%lf", &angle);
- angle = angle * M_PI / 180.0;
- sine = sin(angle);
- cosine = cos(angle);
- tangent = tan(angle);
- printf("The sine of %.2lf degrees is: %.2lf\n", angle * 180.0 / M_PI, sine);
- printf("The cosine of %.2lf degrees is: %.2lf\n", angle * 180.0 / M_PI, cosine);
- printf("The tangent of %.2lf degrees is: %.2lf\n", angle * 180.0 / M_PI, tangent);
- return 0;
- }
给定两个正整数n和r，盘算组合数C(n, r)。
- #include <stdio.h>
- int factorial(int n) {
- if (n == 0) return 1;
- return n * factorial(n - 1);
- }
- int combination(int n, int r) {
- return factorial(n) / (factorial(r) * factorial(n - r));
- }
- int main() {
- int n, r;
- printf("Enter the values of n and r: ");
- scanf("%d %d", &n, &r);
- printf("The combination C(%d, %d) is: %d\n", n, r, combination(n, r));
- return 0;
- }
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