37 lines
712 B
C
37 lines
712 B
C
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/*
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* C Program to Replace all the Characters by Lowercase
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*/
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#include <stdio.h>
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#include <stdlib.h>
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void main(int argc, char* argv[])
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{
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FILE *fp1;
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int ch;
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if ((fp1 = fopen(argv[1], "r+")) == NULL)
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{
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printf("\nfile cant be opened");
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exit(0);
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}
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ch = fgetc(fp1);
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while (ch != EOF)
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{
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if (ch >= 65 && ch <= 90)
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{
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fseek(fp1, -1L, 1);
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fputc(ch + 32, fp1);
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}
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ch = fgetc(fp1);
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}
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}
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/*
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*OUTPUT:
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$ cat file4test
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CHANDANA chanikya
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rAVELLA
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$ cc file4.c
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$ a.out file4test
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$ cat file4test
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chandana chanikya
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ravella
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*/
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