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#include<stdio.h> #include<string.h> void thuong(char *s) { int n = strlen(s); int i; for(i = 0;i<n;i++) { if('A' <= s[i] && s[i] <= 'Z') { s[i] += 32; } } } void noi(char *s, char *g) { int n = strlen(s); int i; int j = 1; int cach = 0; for(i = 0;i<n;i++) { if(s[i] == ' ') { cach++; } } int count = 0; printf("%c", s[0]); for(i = 1;i<n;i++) { if(s[i] != ' ' && s[i-1] == ' ') { count++; if(count == cach) { while(i<n) { printf("%c", s[i]); i++; } break; } else { printf("%c",s[i]); } } } printf("%s", g); } int main() { char s[100]; gets(s); char g[]="@ptit.edu.vn"; thuong(s); noi(s,g); return 0; }
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