// C语言库isalpha()函数 #include <stdio.h> #include <ctype.h> int main () { int var1 = 'd';

// C语言库isalnum()函数 #include <stdio.h> #include <ctype.h> int main () { int var1 = 'd';

// C语言参数化宏 // ----------------------------- #include <stdio.h> #define MAX(x,y) ((x) > (y) ? (x) : (y))

// C语言defined()运算符 #include <stdio.h> #if !defined (MESSAGE) #define MESSAGE "You wish!"

// 标记粘贴(##)操作符 #include <stdio.h> #define tokenpaster(n) printf ("token" #n " = %d", token##n)

#include <stdio.h> // -------------------------------- #definemessage_for(a, b)\\ printf(#a " and " #b ": We love you!\\n")

#include <stdio.h> #include <math.h> int main () { double x, ret; x = 0.5; ret = tanh(x); printf("The hyperbolic tangent of %lf is %lf degrees", x, ret);

#include <stdio.h> #include <math.h> int main () { double x = 0; printf("The exponential value of %lf is %lf\\n", x, exp(x));

#include <stdio.h> #include <math.h> int main () { double x = 1024, fraction; int e; fraction = frexp(x, &e);

#include <stdio.h> #include <math.h> int main () { double x, ret; int n; x = 0.65; n = 3; ret = ldexp(x ,n);

#include <stdio.h> #include <math.h> int main () { double x, ret; x = 2.7; /* finding log(2.7) */

#include <stdio.h> #include <math.h> int main () { double x, ret; x = 10000; /* finding value of log1010000 */

#include<stdio.h> #include<math.h> int main () { double x, fractpart, intpart; x = 8.123456; fractpart = modf(x, &intpart);

#include <stdio.h> #include <math.h> int main () { printf("Value 8.0 ^ 3 = %lf\\n", pow(8.0, 3));

#include <stdio.h> #include <math.h> int main () { double x; x = 0.5; printf("The hyperbolic cosine of %lf is %lf\\n", x, cosh(x));

#include <stdio.h> #include <math.h> #define PI 3.14159265 int main () { double x, ret, val; x = 60.0;