Write a C Program to Convert text of File to LowerCase

By | 01.12.2016

Convert text of File to LowerCase


Write a C Program to Convert text of File to LowerCase. Here’s a Simple Program to Convert text of File to LowerCase in C Programming Language.


Below is the source code for C Program to Convert text of File to LowerCase which is successfully compiled and run on Windows System to produce desired output as shown below :


SOURCE CODE : :


/* C Program to Convert text of File to LowerCase  */

#include <stdio.h>
#include <errno.h>

int to_lower_file(FILE *);

int main()
{
    int op = -1;
    char ch;
    char * arrr = "C:\\Users\\acer\\Documents\\file2.txt";
    FILE *fp;
    if (fp = fopen(arrr, "r+"))
    {
        printf("FILE has been opened..!!!\n");
        op = to_lower_file(fp);
        printf(" %d \n", op);
        fclose(fp);
    }
    else
    {
        perror("Error Occured");
        printf(" %d\n ", op);
    }

    return 0;
}

int to_lower_file(FILE *f)
{
    int c;
    char ch;
    while ((ch = fgetc(f))!= EOF)
    {
        c = (int)ch;
        if (c >= 65 && c <= 90)
        {
            ch = ch + 32;
            fseek(f, -1L, 1);
            fputc(ch, f);
        }
    }
    return 0;
}

 


OUTPUT : :


/* C Program to Convert text of File to LowerCase  */


FILE has been opened..!!!
 0


INPUT IN FILE ::

"HELLO FRIENDS"

OUTPUT IN FILE ::

"hello friends"

Above is the source code for C Program to Convert text of File to LowerCase which is successfully compiled and run on Windows System.The Output of the program is shown above .

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Category: C Programming File Handling Tags:

About Tunde A

My name is Tunde Ajetomobi, a Tech Enthusiast and Growth Hacker. I enjoy creating helpful content that solves problem across different topics. Codezclub is my way of helping young aspiring programmers and students to hone their skills and find solutions on fundamental programming languages.

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