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118 lines
3.3 KiB
C
118 lines
3.3 KiB
C
/*
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* C Program to Replace a specified Line in a Text File
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*/
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#include <stdio.h>
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int main(void)
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{
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FILE *fileptr1, *fileptr2;
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char filechar[40];
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char c;
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int delete_line, temp = 1;
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printf("Enter file name: ");
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scanf("%s", filechar);
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fileptr1 = fopen(filechar, "r");
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c = getc(fileptr1);
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//print the contents of file .
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while (c != EOF)
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{
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printf("%c", c);
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c = getc(fileptr1);
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}
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printf(" \n Enter line number to be deleted and replaced");
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scanf("%d", &delete_line);
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//take fileptr1 to start point.
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rewind(fileptr1);
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//open replica.c in write mode
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fileptr2 = fopen("replica.c", "w");
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c = getc(fileptr1);
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while (c != EOF)
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{
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if (c == 'n')
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{
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temp++;
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}
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//till the line to be deleted comes,copy the content to other
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if (temp != delete_line)
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{
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putc(c, fileptr2);
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}
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else
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{
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while ((c = getc(fileptr1)) != 'n')
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{
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}
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//read and skip the line ask for new text
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printf("Enter new text");
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//flush the input stream
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fflush(stdin);
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putc('n', fileptr2);
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//put 'n' in new file
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while ((c = getchar()) != 'n')
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putc(c, fileptr2);
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//take the data from user and place it in new file
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fputs("n", fileptr2);
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temp++;
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}
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//continue this till EOF is encountered
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c = getc(fileptr1);
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}
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fclose(fileptr1);
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fclose(fileptr2);
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remove(filechar);
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rename("replica.c", filechar);
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fileptr1 = fopen(filechar, "r");
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//reads the character from file
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c = getc(fileptr1);
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//until last character of file is encountered
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while (c != EOF)
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{
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printf("%c", c);
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//all characters are printed
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c = getc(fileptr1);
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}
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fclose(fileptr1);
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return 0;
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/*
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Enter file name: pgm3.c
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/*
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* C Program to Convert Octal to Decimal
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*/
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#include <stdio.h>
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#include <math.h>
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int main()
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{
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long int octal, decimal = 0;
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int i = 0;
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printf("Enter any octal number: ");
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scanf("%ld", &octal);
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while (octal != 0)
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{
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decimal = decimal +(octal % 10)* pow(8, i++);
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octal = octal / 10;
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}
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printf("Equivalent decimal value: %ld",decimal);
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return 0;
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}
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Enter line number to be deleted and replaced 13 replaced
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Enter new text
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/*
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* C Program to Convert Octal to Decimal
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*/
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#include <stdio.h>
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#include <math.h>
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int main()
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{
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long int octal, decimal = 0;
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int i = 0;
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replaced
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printf("Enter any octal number: ");
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scanf("%ld", &octal);
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while (octal != 0)
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{
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decimal = decimal +(octal % 10)* pow(8, i++);
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octal = octal / 10;
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}
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printf("Equivalent decimal value: %ld",decimal);
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return 0;
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} |