Question

Write a C program that inputs a line of text

1) use standard input/output library function to get user input
2) print it out with uppercase
3) reverse the string and print it out
4) uses function strtok to count the total number of words. Assume that the words are separated by either spaces.
Please enter a line of text:
this is a test
=====Change the string to upper case=====
THIS IS A TEST
=====Reverse string=====
TSET A SI SIHT
=====Print the tokens=====
THIS
IS
A
TEST
There are 4 words in the input text

Answer 1

A C program to process a text string to upper case, reverse it, and count the words using strtok.

Step-by-step explanation:

A student has asked for a C program that performs specific operations on a line of text. The program should read a line of text from the user using standard input functions, convert it to uppercase, reverse the string, and use the strtok function to count the total number of words in the string. Here's a sample program that accomplishes these tasks:

#include
#include
#include

int main() {
char str[1000];
printf("Please enter a line of text: ");
fgets(str, sizeof(str), stdin);
str[strcspn(str, "\\")] = 0; // Remove newline character

// Change the string to uppercase
printf("=====Change the string to upper case=====");
for (int i = 0; str[i]; i++) {
str[i] = toupper(str[i]);
}
printf("\\%s\\", str);

// Reverse the string
printf("=====Reverse string=====");
for (int i = strlen(str) - 1; i >= 0; i--) {
putchar(str[i]);
}
printf("\\");

// Tokenize the string and count the words
int wordCount = 0;
char *token = strtok(str, " ");
printf("=====Print the tokens=====");
while (token != NULL) {
printf("%s ", token);
wordCount++;
token = strtok(NULL, " ");
}
printf("\\There are %d words in the input text\\", wordCount);

return 0;
}

This program will read a string from the user, process it according to the requirements, and then output the processed string along with the word count.