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:
Improve this sample solution and post your code through Disqus.
Previous C Programming Exercise: Longest Palindromic Substring from a given string.
Next C Programming Exercise: Length of longest common subsequence of two strings
What is the difficulty level of this exercise?
Test your Programming skills with w3resource's quiz.
- Weekly Trends
- Python Interview Questions and Answers: Comprehensive Guide
- Scala Exercises, Practice, Solution
- Kotlin Exercises practice with solution
- MongoDB Exercises, Practice, Solution
- SQL Exercises, Practice, Solution - JOINS
- Java Basic Programming Exercises
- SQL Subqueries
- Adventureworks Database Exercises
- C# Sharp Basic Exercises
- SQL COUNT() with distinct
- JavaScript String Exercises
- JavaScript HTML Form Validation
- Java Collection Exercises
- SQL COUNT() function
- SQL Inner Join