69 lines
1.8 KiB
C
69 lines
1.8 KiB
C
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/*
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* C Program to Convert the Content of File to UpperCase
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*/
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#include <stdio.h>
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int to_upper_file(FILE *);
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int main(int argc,char *argv[])
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{
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FILE *fp;
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int status;
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if (argc == 1)
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{
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printf("Insufficient Arguments:");
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printf("No File name is provided at command line");
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return;
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}
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if (argc > 1)
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{
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fp = fopen(argv[1],"r+");
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status = to_upper_file(fp);
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/*
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*If the status returned is 0 then the coversion of file content was completed successfully
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*/
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if (status == 0)
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{
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printf("\n The content of \"%s\" file was successfully converted to upper case\n",argv[1]);
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return;
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}
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/*
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* If the status returnes is -1 then the conversion of file content was not done
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*/
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if (status == -1)
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{
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printf("\n Failed to convert");
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return;
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}
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}
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}
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/*
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* convert the file content to uppercase
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*/
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int to_upper_file(FILE *fp)
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{
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char ch;
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if (fp == NULL)
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{
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perror("Unable to open file");
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return -1;
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}
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else
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{
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/*
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* Read the file content and convert to uppercase
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*/
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while (ch != EOF)
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{
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ch = fgetc(fp);
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if ((ch >= 'a') && (ch <= 'z'))
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{
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ch = ch - 32;
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fseek(fp,-1,SEEK_CUR);
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fputc(ch,fp);
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}
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}
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return 0;
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}
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}
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