Question

How to convert a string to PascalCase in C

Answer 1

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

void get_pascal_case(const char *input, char *output) {
    char temp[256];
    strcpy(temp, input);
    int len = strlen(temp);
    int j = 0;
    int capitalize_next = 1;
    int first_char_found = 0; // Flag to track if the first valid char is found.

    for (int i = 0; i < len; i++) {
        if (temp[i] == ' ' || temp[i] == '_') {
            capitalize_next = 1;
        } else {
            if (!first_char_found) {
                first_char_found = 1; // Set flag when first valid char is found.
            }

            if (capitalize_next) {
                output[j++] = toupper(temp[i]);
                capitalize_next = 0;
            } else {
                output[j++] = tolower(temp[i]);
            }
        }
    }
    output[j] = '\0';
}

int main() {
    char output[256];

    get_pascal_case("get file content", output);
    printf("%s\n", output);

    get_pascal_case("get_file_content", output);
    printf("%s\n", output);

    get_pascal_case("get______file___content", output);
    printf("%s\n", output);

    get_pascal_case("get______file____  content", output);
    printf("%s\n", output);

    get_pascal_case("GET FILE CONTENT", output);
    printf("%s\n", output);

    get_pascal_case("get    file      content", output);
    printf("%s\n", output);

    get_pascal_case("getFileContent", output);
    printf("%s\n", output);

    get_pascal_case("  get file content", output);
    printf("%s\n", output);

    get_pascal_case("get file content  ", output);
    printf("%s\n", output);

    return 0;
}


  
/*
run:
  
GetFileContent
GetFileContent
GetFileContent
GetFileContent
GetFileContent
GetFileContent
Getfilecontent
GetFileContent
GetFileContent
  
*/

 

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