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#include <stdio.h>
void up_case(char *s) {
char c;
while (*s) {
c = *s;
if (c >= 'a' && c <= 'z')
*s = (c - 'a') + 'A';
s++;
}
}
void main() {
char s[50];
printf("input string ? ");
fgets(s, 50, stdin);
up_case(s);
printf("%s", s);
}