C Programming: Replace every lowercase letter with the same uppercase

C String: Exercise-40 with Solution

Write a C program to replace each lowercase letter with the same uppercase letter of a given string. Return the newly created string.

Sample Data:

("Python") -> "PYTHON"
("abcdcsd") -> "ABCDCSD"

Sample Solution-1:

C Code:

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
char * test(char * text) {
  if (!text[0])
    return "No string found.";
    char *tt = text;
    while(*tt != '\0')
    {
        if (*tt >= 'a' && *tt  <= 'z')
        {
            *tt = *tt + 'A' - 'a';
        }
        tt++;
    }
    return text;
}
int main() {
 //char text[50] = "";    
 char text[50] = "Python";
  //char text[50] = "abcdcsd";
    printf("Original string: %s",text);
    printf("\nReplace each lowercase letter with the same uppercase in the said string:\n%s ",test(text));
    return 0;
} 

Sample Output:

Original string: Python
Replace each lowercase letter with the same uppercase in the said string:
PYTHON 

Flowchart :

Sample Solution-2:

C Code:

#include <stdio.h>
#include <string.h>
#include <stdlib.h>

char * test(char * text) {
  if (!text[0])
    return "No string found.";
  int i, str_len = strlen(text);
  char * result_str = (char * ) malloc(sizeof(char) * str_len);
  for (i = 0; i < str_len; i++) {
    if ( * (text + i) >= 'a' && * (text + i) <= 'z') {
      *(result_str + i) = * (text + i) - 32;
    } else {
      *(result_str + i) = * (text + i);
    }
  }

  *(result_str + str_len) = '\0';
  return result_str;
}

int main() {
  //char text[50] = "";
  //char text[50] = "Python";
  char text[50] = "abcdcsd";
  printf("Original string: %s", text);
  printf("\nReplace each lowercase letter with the same uppercase in the said string:\n%s ", test(text));
}

Sample Output:

Original string: abcdcsd
Replace each lowercase letter with the same uppercase in the said string:
ABCDCSD 

Flowchart :

C Programming Code Editor:

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