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#include <stdio.h>#include <stdlib.h>int comparestr(const char *, const char *);const char* getocc(const char *, char);int main(int argc, char *argv[]) {    char test1[] = "This is a string";    char test2[] = "This is a string";    char test3[] = "This is another string";    char test4[] = "And this is not";    char test5[] = "Teste";    const char *a = getocc(test5, 'e');    printf("Test1 and test2: %s\n", comparestr(test1, test2) ? "not equal" : "equal");    printf("Test3 and test4: %s\n", comparestr(test3, test4) ? "not equal" : "equal");    printf("Tester getocc: %s\n", (*a == 0) ? "fant ikke!" : "fant!");    exit(EXIT_SUCCESS);}int comparestr(const char *a, const char *b) {    while(*a == *b) {        if (*(a++) == 0)             return 0;        b++;    }    return 1;}const char* getocc(const char *a, char c) {    while (*a && *a != c) {        if (*(a++) == 0)            return 0;    }    return a;}