stdio.h

The following functions are defined in stdio.h. 
clearerr    fputc       getchar     rewind  
fclose      fputs       gets        scanf    
feof        fread       perror      setbuf   
ferror      freopen     printf      sprintf  
fflush      fscanf      putc        sscanf   
fgetc       fseek       putchar     tmpfile  
fgets       ftell       puts        tmpnam  
fopen       fwrite      remove      ungetc
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