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C语言从函数返回指针
#include <stdio.h> #include <time.h> /* function to generate and return random numbers. */ int * getRandom( ) {
C语言字符串函数
#include <stdio.h> #include <string.h> int main () { char str1[12] = "Hello"; char str2[12] = "World";
C库宏错误号errno
#include <stdio.h> #include <errno.h> #include <string.h> extern int errno ; int main () {
C语言库toupper()函数
#include <stdio.h> #include <ctype.h> int main () { int i = 0; char c; char str[] = "Tutorials Point";
C语言库tolower()函数
#include <stdio.h> #include <ctype.h> int main () { int i = 0; char c; char str[] = "TUTORIALS POINT";
C语言isxdigit()库函数
#include <stdio.h> #include <ctype.h> int main () { char var1[] = "tuts"; char var2[] = "0xE";
C语言isupper()库函数
#include <stdio.h> #include <ctype.h> int main () { int var1 = 'M'; int var2 = 'm';
C语言isspace()库函数
#include <stdio.h> #include <ctype.h> int main () { int var1 = 't'; int var2 = '1';
C语言ispunct()库函数
#include <stdio.h> #include <ctype.h> int main () { int var1 = 't'; int var2 = '1';
C语言库isprint()函数
#include <stdio.h> #include <ctype.h> int main () { int var1 = 'k'; int var2 = '8';
C语言islower()库函数
#include <stdio.h> #include <ctype.h> int main () { int var1 = 'Q'; int var2 = 'q';
C语言isgraph()库函数
#include <stdio.h> #include <ctype.h> int main () { int var1 = '3'; int var2 = 'm';
C语言isdigit()库函数
#include <stdio.h> #include <ctype.h> int main () { int var1 = 'h'; int var2 = '2';
C语言iscntrl()库函数
#include <stdio.h> #include <ctype.h> int main () { int i = 0, j = 0; char str1[] = "all \\a about \\t programming";
C语言isalpha()库函数
// C语言库isalpha()函数 #include <stdio.h> #include <ctype.h> int main () { int var1 = 'd';
C语言isalnum()库函数
// 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
// 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
// C语言defined()运算符 #include <stdio.h> #if !defined (MESSAGE) #define MESSAGE "You wish!"
C语言标记粘贴##操作符
// 标记粘贴(##)操作符 #include <stdio.h> #define tokenpaster(n) printf ("token" #n " = %d", token##n)
C语言Stringize＃运算符
#include <stdio.h> // -------------------------------- #definemessage_for(a, b)\\ printf(#a " and " #b ": We love you!\\n")
C语言库tanh()函数
#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);
C语言库exp()函数
#include <stdio.h> #include <math.h> int main () { double x = 0; printf("The exponential value of %lf is %lf\\n", x, exp(x));
C语言库frexp()函数
#include <stdio.h> #include <math.h> int main () { double x = 1024, fraction; int e; fraction = frexp(x, &e);
C语言库ldexp()函数
#include <stdio.h> #include <math.h> int main () { double x, ret; int n; x = 0.65; n = 3; ret = ldexp(x ,n);
C语言库log()函数
#include <stdio.h> #include <math.h> int main () { double x, ret; x = 2.7; /* finding log(2.7) */
C语言库log10()函数
#include <stdio.h> #include <math.h> int main () { double x, ret; x = 10000; /* finding value of log1010000 */
C语言库modf()函数
#include<stdio.h> #include<math.h> int main () { double x, fractpart, intpart; x = 8.123456; fractpart = modf(x, &intpart);
C语言库宏va_end()
#include <stdio.h> #include <math.h> int main () { printf("Value 8.0 ^ 3 = %lf\\n", pow(8.0, 3));
C语言库cosh()函数
#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));
C语言库cos()函数
#include <stdio.h> #include <math.h> #define PI 3.14159265 int main () { double x, ret, val; x = 60.0;
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