# include <stdio.h>
int myStrlen(const char s[])
{
int i;
for(i=0; s[i]!='\0'; i++)
;
return i;
}
void myStrcat(char s[], char t[])
{
int i=myStrlen(s);
int j=myStrlen(t);
s[i+j]='\0';
for(int k=0; k<j; k++)
s[i+k]=t[k];
}
int main(){
char s[100];
char t[100];
myStrcat(s,t);
return 0;
}
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