ferror: check for a file error : ferror « stdio.h « C / ANSI-C

1. C / ANSI-C
2. stdio.h
3. ferror

ferror: check for a file error

//Declaration:  int ferror(FILE *stream); 
//Return:       0: no error has occurred.   
                Nonzero: an error has occurred.  

  #include <stdio.h>
  #include <stdlib.h>

  int main(void){
     FILE *fp;

     if((fp=fopen("test", "rb"))==NULL) {
        printf("Cannot open file.\n");
        exit(1);
     }

     putc('C', fp);
     if(ferror(fp)) {
       printf("File Error\n");
       exit(1);
     }
    
     fclose(fp);
     return 0;
  }


           
       

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