CS256 - Principles of Structured Design Fall 2021

Displaying ./code/sternflCode/swapCase.c

#include<stdio.h>


int main() {
  int c;
  FILE *f = fopen("myDiary", "r");
  int diff =  'a'-'A';
  while ( (c=fgetc(f)) != EOF) {
    if (c>='A' && c<= 'Z')
         c = c+diff;
    else if (c>='a' && c<='z')
         c = c-diff;
    putchar(c);
      
  }
}