43 lines
883 B
C
43 lines
883 B
C
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/*
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* C Program to Convert the Content of File to LowerCase
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*/
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#include <stdio.h>
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#include <errno.h>
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int to_lower_file(FILE *);
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void main(int argc, char * argv[])
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{
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int op = -1;
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char ch;
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FILE *fp;
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if (fp = fopen(argv[1], "r+"))
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{
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printf("FILE has been opened..!!!\n");
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op = to_lower_file(fp);
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printf(" %d \n", op);
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fclose(fp);
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}
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else
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{
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perror("Error Occured");
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printf(" %d\n ", op);
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}
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}
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int to_lower_file(FILE *f)
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{
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int c;
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char ch;
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while ((ch = fgetc(f))! = EOF)
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{
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c = (int)ch;
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if (c >= 65 && c <= 90)
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{
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ch = ch + 32;
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fseek(f, -1L, 1);
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fputc(ch, f);
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}
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}
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return 0;
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}
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