C programming questions requirements: You CANNOT call any library functions // 7
ID: 3666960 • Letter: C
Question
C programming questions
requirements: You CANNOT call any library functions
// 7. Write a function that searches for the first occurrence of substring1 in string.
// If substring1 is found, replace it with substring2.
// Note that substring1 and substring2 do not necessarily have the same size.
// The function returns the resulting string size if substring1 is found and replaced by substring2.
// The string size does not include the terminating null character itself.
// If substring1 is not found in string, the function returns -1.
// Note that the caller must ensure that there is sufficient storage allocated to string to hold the new string.
int search_replace(char* string, char* substring1, char* substring2) {
// TODO: add your code here
}
Explanation / Answer
void strreplace(char string[], char search[], char replace[]){ char buffer[100]; char*p = string; while((p=strstr(p, search))){ strncpy(buffer, replace); buffer[p-string] = ' '; //EDIT: THIS WAS MISSING strcat(buffer, replace); strcat(buffer, p+strlen(search)); strcpy(string, buffer); p++; } }
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