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#include <stdio.h> #include <ctype.h> int main(void) { char s[30] = "c c++ c# java"; int i = 0; while(s[i]) { s[i] = toupper(s[i]); i++; } puts(s); return 0; } /* run: C C++ C# JAVA */
#include <stdio.h> #include <ctype.h> int main(void) { char s[30] = "c c++ c# java"; int i = 0; while(s[i]) { putchar(toupper(s[i])); i++; } return 0; } /* run: C C++ C# JAVA */