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35 lines
590 B
35 lines
590 B
/* Exercise 5-3. Write a pointer version of the function strcat that we showed
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* in Chapter 2: strcat(s,t) copies the string t to the end of s. */
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#include <ctype.h>
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#include <stdio.h>
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// version 1
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void my_strcat1(char *s, char *t) {
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while (*s)
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s++; // go to end of s
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while ((*s = *t) != '\0') {
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s++;
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t++;
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}
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}
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// version 2
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void my_strcat2(char *s, char *t) {
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while (*s)
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s++; // go to end of s
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while ((*s++ = *t++))
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; // then copy
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}
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int main() {
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char s[50] = "Hello, ";
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char t[] = "world!";
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my_strcat2(s, t);
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printf("%s\n", s);
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return 0;
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}
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