Update 'du1/program.c'
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@ -13,10 +13,10 @@ while(r != EOF){
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}
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}
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if(r >= 'a' && r <= 'z'){
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if(r >= 'a' && r <= 'z'){
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r = r + 32;
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r -= 32;
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}
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}
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else if(r >= 'A' && r <= 'Z'){
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else if(r >= 'A' && r <= 'Z'){
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r = r - 32;
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r += 32;
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}
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}
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putchar(r);
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putchar(r);
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}
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}
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