22.c语言各种输入输出与错误处理

1.errno

2.strerror(errno)

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3.perror()

向标准错误输出信息：

#include <stdio.h>int main (){   FILE *fp;   fp = fopen("file.txt", "r");   if( fp == NULL ) {      perror("Error: ");      return(-1);   }   fclose(fp);   return(0);}

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4.printf()

5.fprintf()

6.sprintf()

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fgetc(), fgets()fputc(), fputs()getchar(),putchar(),ferror(), feof(), clearerr()

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http://www.yiibai.com/c_standard_library/c_function_perror.html

http://www.360doc.com/content/12/1226/19/9305922_256429771.shtml

http://blog.csdn.net/fareast8612/article/details/6848699

http://www.yiibai.com/c_standard_library/c_function_fprintf.html