convert to lowercase in c
/* Use the tolower Function to Convert String to Lowercase in C */
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
int main(){
char *str = "THIS STRING LITERAL IS ARBITRARY";
printf("%s\n", str);
for (size_t i = 0; i < strlen(str); ++i) {
printf("%c", tolower((unsigned char) str[i]));
}
printf("\n");
exit(EXIT_SUCCESS);
}convert string to lowercase in c
// include all the libraries used in the program.
#include <stdio.h>
#include <cs50.h>
#include <ctype.h>
#include <string.h>
#include <math.h>
// Base Function
int main(int argc, string argv[])
{
if (argc != 2)
{
printf("Usage: ./substitution key\n");
}
else if (strlen(argv[1]) != 26)
{
printf("Key must contain 26 characters.\n");
}
string key = argv[1].toupper();
string key = argv[1].tolower();
}Copyright © 2021 Codeinu
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