C++ Exercises: Replace all the words "dog" with "cat"
C++ Basic: Exercise-81 with Solution
Write a C++ program that replaces all the words "dog" with "cat".
Sample Text: The quick brown fox jumps over the lazy dog. You can assume that the number of characters in a text is less than or equal to 1000
.
Pictorial Presentation:

Sample Solution:
C++ Code:
#include <iostream>
using namespace std;
int main()
{
string str;
getline(cin, str);
cout << "Original text: " << str;
for (int j = 0; j < (int)str.size(); j++) {
string key = str.substr(j, 3), repl;
if (key == "fox") {
repl = "cat";
for (int k = 0; k < 3; k++) {
str[j+k] = repl[k];
}
}
}
cout <<"\nNew text: " << str << endl;
return 0;
}
Sample Output:
Original text: The quick brown fox jumps over the lazy dog New text: The quick brown cat jumps over the lazy dog
Flowchart:

C++ Code Editor:
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Previous: Write a C++ program that accepts n different numbers (0 to 100) and s which is equal to the sum of the n different numbers.
Next: Write a C++ program which reads a list of pairs of a word and a page number, and prints the word and a list of the corresponding page numbers.
What is the difficulty level of this exercise?
C++ Programming: Tips of the Day
Why is there no std::stou?
The most pat answer would be that the C library has no corresponding "strtou", and the C++11 string functions are all just thinly veiled wrappers around the C library functions: The std::sto* functions mirror strto*, and the std::to_string functions use sprintf.
Ref: https://bit.ly/3wtz2qA
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