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#include <stdio.h>

int main() {
    
    FILE *file;
    int i = 1;
    char name[] = "Klaus";
    file = fopen("datei.txt", "w");
    if(!file) {
        printf("Dateifehler"); 
    } else {
        fprintf(file, "Ich bin die %d Zeile\n", i);
        fprintf(file, "Ich bin %s\n", name);
        fclose(file);
    }
    
    
    return 0;
    
}