大家好，今天和大家聊一下字符的输入/输出。
// 从stream中读取字符int fgetc ( FILE * stream );int putc ( int character, FILE * stream );int getc ( FILE * stream );// 从stream中读取字符串char * fgets ( char * str, int num, FILE * stream );// 向stream中写入字符int fputc ( int character, FILE * stream );//int putc ( int character, FILE * stream );// 向stream中写入字符串int fputs ( const char * str, FILE * stream );// 从标准输入（stdio）读取一个字符int getchar ( void );// 从标准输入（stdio）读取一个字符串char * gets ( char * str );// putcharWrite character to stdout (function )putsWrite string to stdout (function )ungetcUnget character from stream (function ) 下面我们来看看实例代码。
#include <stdio.h>int main ( ) ?{ ?FILE * pFile; ?int c; ?int n = 0; ?pFile=fopen ("myfile.txt","r"); ?if (pFile==NULL) ??????????perror ("Error opening file"); ?else ?{ ???do { ?????c = fgetc (pFile); ?????if (c == \\\'$\\\') n++; ???} while (c != EOF); ???fclose (pFile); ?} ?return 0;} #include <stdio.h>int main(){ ??FILE * pFile; ??char mystring [100]; ??pFile = fopen ("myfile.txt" , "r"); ??if (pFile == NULL) ????perror ("Error opening file"); ??else { ????if ( fgets (mystring , 100 , pFile) != NULL ) ??????puts (mystring); ????fclose (pFile); ??} ??return 0;} #include <stdio.h>int main (){ ?FILE * pFile; ?char c; ?pFile = fopen ("alphabet.txt","w"); ?if (pFile!=NULL) { ???for (c = \\\'A\\\' ; c <= \\\'Z\\\' ; c++) ?????fputc ( c , pFile ); ???fclose (pFile); ?} ?return 0;} #include <stdio.h>int main (){ ??FILE * pFile; ??char sentence [256]; ??printf ("Enter sentence to append: "); ??fgets (sentence,256,stdin); ??pFile = fopen ("mylog.txt","a"); ??fputs (sentence,pFile); ??fclose (pFile); ??return 0;} #include <stdio.h>int main (){ ?int c; ?puts ("Enter text. Include a dot (\\\'.\\\')" ??????????" in a sentence to exit:"); ?do { ???c=getchar(); ???putchar (c); ?} while (c != \\\'.\\\'); ?return 0;} #include <stdio.h>int main(){ ?char string [256]; ?printf ("Insert your full address: "); ?// warning: unsafe (see fgets instead) ?gets (string); ??printf ("Your address is: %sn",string); ?return 0;} #include <stdio.h>int main () ?{ ?char c; ?for (c = \\\'A\\\' ; c <= \\\'Z\\\' ; c++) ????putchar (c); ?return 0;} #include <stdio.h>int main () ?{ ?char string [] = "Hello world!"; ?puts (string);} 今天的内容就这么多了，以上的内容虽然看起来简单。
但是，想要运用自如的话，还是需要大家勤加联系的。