Program to change letters case in a file
Program to change all upper-case letters in a file to lower case letters and vice versa.
#include<stdio.h> main() { FILE *fp1,*fp2; char c; fp1=fopen("text.txt","r"); fp2=fopen("copy.txt","w"); while((c=getc(fp1))!=EOF) { if(c>=65&&c<=91) c=c+32; else c=c-32; putc(c,fp2); } fcloseall(); }
Output:
Share: