浮点数保存带小数点的值。以下代码是浮点值的示例：#include stdio.h int main(void)

可以写在指数格式浮点数的值。值使用指数使用C语写成1.60.16 x 10^10.16E10.000080.8 x 10^-4

浮点变量类型仅存储浮点数。关键字字节数值范围float4+/- 3.4E +/- 38(精确到6到7位小数)

#include stdio.hint main() {int c;while ((c = getchar()) != EOF){putchar(c);}}

#include stdio.hint lower(int c){if (c = A c = Z)return c + a - A;

#include stdio.hint main()/*fromww w.java 2s. com*/{double nc;for (nc = 0; getchar() != EOF; ++nc)

#include stdio.hint main(void){int c, blank_recieved = 0;printf(Input some characters, when you finishes, press Ctrl+D.\\n);

#include stdio.hint main(void){int c;printf(Input some characters, then press Ctrl+D.\\n);

#include stdio.h#define IN1/* inside a word */#define OUT0/* outside a word */int main() {int c = 0, nl = 0, nw = 0, nc = 0, state = OUT;

#include stdio.hint main(void){int c, bl, tl, nl;bl = 0;tl = 0;nl = 0;printf(Input some characters, then press Ctrl+D.\\n);

#include stdio.hint main(){ int c, nl = 0;while ((c = getchar()) != EOF){if (c == \\n)

#include stdio.hint main(void){int c = 0, linestarted = 0;printf(Input some characters, then press Ctrl+D.\\n);

#include stdio.hint lower(int c);int main(void){char s[] = ABCDEFGHIJKLMNOPQRSTUVWXYZ;

#include stdio.h#define MAXLINE 1000int getchars(char line[], int maxline);void escape(char s[], char t[]);

#include stdio.h#include ctype.h// for isspace()#include stdbool.h// for bool, true, false

#include stdio.h#define SIZE 26 int main( void ){char lcase[SIZE];int i;for (i = 0; i SIZE; i++)

#include stdio.hint main(void) {int ascii;printf(Enter an ASCII code: );scanf(%d, ascii);

// 输入int ch;ch = getchar();while(ch != EOF) {putchar(ch);ch = getchar();}// 输出int ch;while((ch = getchar()) != EOF)

使用for循环：double count;for(count = 0; getchar() != EOF; ++count);/* null statement */printf(%.0f\\n, count);

int ch, count = 0;while((ch = getchar()) != EOF)if(ch == \\n)++count;printf(%d\\n, count);