OJ 1193

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#include <stdio.h> #include <string.h> #include <stdlib.h> #include <ctype.h> char str[100][100] = { 0, }; int main() { int n; scanf("%d", &n); for (int i = 0; i < n; i++) { scanf("%s", str[i]); for (int j = 0; j < strlen(str[i]); j++) { if (isupper(str[i][j]) != 0 ) { str[i][j] = tolower(str[i][j]); } else { str[i][j] = toupper(str[i][j]); } } } for (int i = 0; i < n; i++) { printf("%s\n", str[i]); } }