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String to Upper Case - STRUPR

/* STRING TO UPPER CASE - STRUPR */
#include<stdio.h>

int main()
{
 char str[100];
 int i;
 printf("Please enter a string: ");

 // gets(str); 
 // fgets is a better option over gets to read multiword string .

 fgets(str, 100, stdin);

 // Following can be added for extra precaution for '\n' character
 // if(str[length(str)-1] == '\n') str[strlen(str)-1]=NULL;
 
 for(i=0;str[i]!=NULL;i++)
 {
  if(str[i]>='a'&&str[i]<='z')
   str[i]-=32;
 }
 
 printf("String in upper case is: %s",str);

 return 0;
}

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